Norton commando gearbox. Aug 28, 2013 · The i.

Norton commando gearbox Hypoid (extreme pressure) oils are allegedly not needed for straight cut gear boxes. p. Not a rebuild project though. 1/4 to 5/16" of freeplay at the lever with Maguar levers. I used to change it out every other oil change. Nov 7, 2013 · Using their best stupidity, Norton made the cradle so the gearbox could easily come out but also made the cradle so the engine interferes with taking the gearbox out. 18"approx commando top washer of 1/8" is commonly sold and is wrong/skinnyor left out all together both final gearbox + washer are the same width as a norton heavy twin engine mounting not exactly rocket science or calculus math EDIT: Sorry for repeat: took to long to post Dec 28, 2009 · Needing, Maybe you don't ride your bike long enough to get the gearbox up to temp but I will guarantee that after a day ride across Tx in the summer my gearbox is warm enough to evaporate the moisture. 2014 Previously paul_gilbert wrote: Just purchased a 1971 Norton Commando and just starting to learn about the bike. Jun 9, 2004 · My 850 Commando has what appears to be a whine and the odd clunk mainly in second and third gear. The ball bearing often doesn't require shimming, unlike the roller. I can put my full 170 lbs on top of the starter and it will push through but eventually stick in May 7, 2005 · 2 years ago i aquiered a "not runner" 750. chris@a2. I test fitted the new 1st gear bush (no gear) on the layshaft and noticed it wasn't exactly snug either, so maybe the old bush is fine. A low first gear and the other three high and close, might be better than standard ratios. I always thought the bearing conversion was a standard upgrade whenever doing work to the Commando gearbox. According to Roy Bacon, the AMC 1 box was built from 1956-59. Jun 5, 2012 · Gearbox oil when filled to the proper level will not rise to the seal level when the bike is level, as in riding therefore, gearbox oil cannot get out of there unless the bike is on the side stand and thus tilting left, then the gearbox oil can just reach the seal Feb 12, 2013 · After rebuild I asked ancient Norton racers on NOC-UK, Brit Iron list and INOA fourm about ATF to be told that was their standard in AMC boxes. see attached pics for reference (bugger how do you attach images to this post!?) Sep 10, 2024 · My 1974 Commando 850 locked up my rear wheel yesterday, strongly supspect gear box issues. Access Norton Default Dark Theme Nov 20, 2004 · The cross shaft is angled to miss the clutch drum and its mentioned in the workshop manual. Jul 24, 2006 · I have a friend who is considering fitting a 23t gearbox sprocket on his Commando 850 , and was asking me if I thought it was a flawed idea because of the extra torque, and based on the advice in the Norton service notes which suggests that: J. Apr 27, 2015 · So, like any neurotic Norton owner, I'm always looking for trouble, inspecting stuff rather than just riding my bike 'til something breaks. Plugs look nice too. He is in a Care home now. On a race track when all gears are close and high, I never go below second gear. It would seem, from reading the numbers discussion there, that your gearbox is most likely late 50s. RG17 0RB Telephone: 01488-686816 office@andover-norton. Introduced on Norton, AJS and Matchless bikes in the 1956/57 season it was used on the former's products from then until production ceased with the Commando. So, keep an eye on your gearbox oil and change it every other engine oil change. 8091" which is not bad - only about 0. Please give me some guidance on the correct procedure. Gearbox Mainshaft bearing, timing side This was my first Norton gearbox overhaul. I wrote looking for a solution to gearbox leaks. I’m sure I can find something that will work, but this thing was leaking like crazy from both. And if you haven't seen the accumulation of rust in a gearbox cover then you haven't worked on many Commandos. Oct 1997 Jan 16, 2019 · commando top gearbox boss is 3. It was in low speed and I could pull the clutch and stopped quickly. Commando boxes had the engine number stamped on them starting in 1968. Jun 1, 2011 · Self admitted newbie here. 05 Yes 12-200003 NOR ILL Bushing Kit, Gearbox Commando, Pre-MK3 1 2 - 271. Unfortunately not. We looked at getting a simple right angled drive of 1 to 1 ratio, but they were too expensive. : I believe layshaft bail bearing failures arc May 9, 2013 · First of all, thanks to everyone for helping me figure out the rich fuel condition I was experiencing. Dec 3, 2012 · Norton Commando Forum . I greased the inner and outer paper gaskets on assembling. This is an excellent diagram in several segments showing just how the power is transmitted through the gears. 003" undersize. extra ISO under gearbox head steady delete. I have been busy getting the ancillary parts ready and have Sep 10, 2024 · My 1974 Commando 850 locked up my rear wheel yesterday, strongly supspect gear box issues. Initially having a nominal 750 cc displacement , actually 745 cc (45. For example, the chart indicates that an SAE 50 engine oil and an SAE 90 gear oil are the same viscosity. andover-norton. The overall gearing is also affected by the size of the final drive sprocket; usually 19, 20 or 21 teeth, occasionally 22. Made in England by Andover Norton this set includes everything you will need for a complete rebuild of your engine, gearbox and primary. I did not have to take the outer cover off and mess with the ratchet spring and pawl to fix an occasional issue upshifting from 2nd to 3rd. Feb 21, 2019 · The top hat fits inside the wheel bearing and inside the gearbox, sandwhiching the gearbox housing between the outside spacer and the top hat spacer on the inside. Strongly suspect the gear selector has never been centred correctly on my bike as I have had problems in this area before, which arose when I had two failed gear selector rods. I would change into first gear when Jul 5, 2022 · I have used 75 wt as was speced for Saab 99, 900, etc. What make & grade of oil is best for my Commando gearbox? 1973 750cc Commando Interstate Thanks Neil Nov 6, 2011 · having rebuilt the gearbox and followed the advice of a well known Norton engine builder. If you are not familiar with the Commando gearbox, see Commando Gearbox -- How does it work? There is a companion article that can be used along with this article, see Gearbox assembling Check Lists. Apr 15, 2009 · I believe the actual reason the gearbox had to be made non-adjustable on the MkIII model (thus the need for the internal primary tensioner mechanism) was in fact due to the addition of the cross over shaft for the MkIII left foot gearshift. 50-65 hp is a lot. Apr 25, 2010 · Classic Norton Commando Forum. Dec 29, 2011 · 040046 which I have seen crumble away on several Commando AMC gearboxes. What has been said about gear oil sucking water is true. If you have the cover off be sure and replace both the kick start and shifter seals with the new x-ring or quad type avaiblable from Andover Norton along with a new cover gasket. K. This particular video shows the Gearbox high ge Dec 2, 2020 · Hi everyone, I’m new to the forum and have a question on how to identify gearbox, year and model. It has recently developed a strange -- and worrying issue -- whereby the kickstarter will effectively lock up on the compression stroke when starting. au) on NOC-L 29th. see attached pics for reference (bugger how do you attach images to this post!?) Nov 10, 2012 · I have found it best to assemble the inner gearbox cover onto the gearbox shell with the quadrant and camplate in position but with no other parts in the box apart from the detent plunger in position. Aug 19, 2014 · Norton S#305822lAMC Gearbox Dick CaseyAugust. This particular video shows May 13, 2007 · No, nothing will happen, and perhaps you misunderstood what I meant, but the mainshaft should only need to be stopped from turning when the clutch centre nut needs to be loosened at the drive side end, or when the nut at the other end of the mainshaft needs to be loosened, for instance if you intended to remove the gearbox inner cover, and there would be no other reason to stop the shaft Jan 5, 2017 · 1) What date was this gearbox box made? 2) Is it OK to continue to refurbish the box and use it on the commando? The gearbox was fitted by one of the previous owners between 1973 - 1975 after which it was in store until 2016. I could not believe how bad the Commando motor could be until I tried to race it with standard ratios in the gearbox - It was useless. Many Norton Commando - Gearbox & Clutch We specialise in Quality rebuilds on the Norton gearbox. In this video we take the fully disassembled transmission and put it back together again. but resold as Norton 404098 by the Norton parts suppliers for more money, as I would expect. made! Absolutely the best and correct gasket set you will find for your Norton Commando 1973 MKII and 1974 MKIIA models. Mar 1, 2008 · My impression is that it sometimes takes a bit of shimming and fiddling to get the AMC gearbox just right. Make sure the assembly does not touch or rub on the rear wheel hub cover. Includes the two piece layshaft inner bearing for ease of assembly. They are non- unit motors. the book has been wrong in the past, so was just wondering. Oct 12, 2007 · When I get the Old Nail running again, I'll report back on how well the stuff works. Mar 23, 2023 · Then refitted the outer gearbox cover a total of five times and still not gear change happening either way either up or down. I”’m clearing my 90 year old fathers garage as the house has been sold. I have heard several people refer to a a ratchet spring in the gear box Dec 14, 2016 · Hi. Anything that was carries over from pre commando was generally left with the original thread BSF BSW or cycle mostly on the engine and gearbox. Does the box need to be in any particular gear to refit the outer cover successfully May 9, 2017 · The 1962 ES2 (originally Model 50) has gearbox number NA3298 and the 1964 650SS has gearbox number NA6062. 50" OD x 1. Jul 16, 2020 · The Norton gearbox is easier to overhaul than either the Triumph or BSA especially if you go on Old Brits website. Oct 1, 2018 · Finished up the gearbox Thursday morning and road tested. My kick starter level locked to the forward motion of the bike and was found in a most un-natural position. Fortunately proceeding slowly, pulling in the clutch did not help. So there will be a "gap" between the sleeve gear and the splines on the mainshaft. Mar 5, 2010 · My workshop manual says that there should be a minimum of 0. Definitely replace layshaft bearing. I inspected my primary chain a few days ago. The rod is not riding on the adjuster full time. Greg Kricorissian suggested fitting a 'Quad' ring in place of the O-rings. Simple o-rings came out. There is a top hat spacer (item 34 on OB rear wheel assembly) that usually needs replacing to keep the gearbox from rubbing. While slow riding in second gear and slightly opening and closing the throttle it's very noticeable and rough. " British Cycle Supply Company. Can somebody give me the part Jun 11, 2008 · Im currently rebuilding a Commando which has a 72 750 Combat engine and an early 73 850 Commando frame. My Mercury gearbox is stamped with the engine number followed by an N. 100 (3/32) inches or so of end float in the layshaft/kickshaft connection. Dec 20, 2011 · The gear clusters in many Norton gear boxes are interchangeable. Joined Jul 12, 2015 Messages the exclusive source of all genuine norton commando and norton dominator factory spare parts phone: +44 (0) 1264 359 565 | telefax: +44 (0) 1264 748 409 | Web shop order questions or Retail sales, Trade Sales, Delivery queries: sales@andover-norton. Feb 7, 2010 · Received a engine/ gearbox seal kit and was disappointed that it didn’t include o-rings or seals for the kickstart or shifter shafts. Go figure. Mar 6, 2022 · !973 750 Commando. The engine drive turns at half speed, the tacho is 2 to 1, so the gearbox on the engine needs to be 1 to 1. PM999S; May 13, 2024; Norton Commando Forum; Replies 2 Views 288. Mar 24, 2012 · Lowering the gear oil level to the appropriate level, and have a stand that doesn't tilt my bike to a 45 degree angle stopped the gearbox leak!! I have ridden it for about 15 miles and not a drop of gear oil is leaking now. These two morphed from 68 thru 75 as these components were updated with an ever changing mix. marshg246. Leaving the driveway and onto the road, could not get second gear then overran/skipped into third. Jan 2, 2013 · It is the one in the shaped timing chest of the pre-unit triumph. I’m running GP carbs and messing around with longer carb spacers as in the photos to see what length works best and busy This is one of a series of videos covering the full dismantling, restoration and rebuild of a Norton Commando engine and gearbox. We offer kits that will fit all Norton Commando models (right hand and left hand shift), Atlas, Dominator, and even Matchless models with the AMC gear box. Every gear change was horrible - up or down - never smooth enough, and the bike would not accelerate quick enough. Roller Layshaft bearing and new sleeve gear bushes. They say that this helps synchros come to equal speeds more quickly, for faster shifting. Look it up at Andover norton. I undid the tension on the bolt in the slotted hole and ran the adjuster out to add Oct 4, 2013 · Not a drop of oil from engine or gearbox where used. Since the trans unit runs cold and is isolated from engine heat, condensation, emulsified by gear action turns the gear lube to a grayish slime after a while. Aug 28, 2013 · The i. Ended up not using it and referencing the exploded diagrams of the gearbox in my old Haynes manual when I finally got around to taking the gearbox apart. tpeever. 74ok; Jan 6, 2025; 2 3 Sep 15, 2018 · As a predominant rule, all new items and parts for the commando era are unified thread. Gearbox shell failure. N8XXX for the later boxes and EIV XXX for the early boxes Aug 28, 2013 · The i. It starts and runs better and seems to have a little more pep. The Commando gearbox, not transmission, please… (a transmission in Brit-speak is your primary) has been around a long time and transferred power on many machines. 91 (Quaife close ratio set) to 2. Best thing is you don't have to pull the box to do it. I have found a variety of complete gear box’s, they are not the AMC / Comando shaped gear box,s Apr 29, 2009 · Greetings All, I was removing the gearbox outer cover to deal with persistent leak from kickshaft seal and noticed what looks like approximately . Probably to secure the bearing in the shell to prevent rotation. What's new. abc. 010 in. If it does, it has a tendency to drag the gearbox around and mess up everything. Runs down and drips off the bottom of the gear box. What is the maximum gap allowed? and what happens if the gap is too small or great. Jason May 12, 2015 · There is no need to avoid GL5 and use GL4, early versions of GL5 attacked bronze/brass bushes at 100C and above (ref Glacier Bearing Design Handbook) but within a few years of the GL5 introduction the chemicals that caused the issue were subsitituted for safe alternatives and for the last few decades GL5 oils are safe for use in Norton Gearboxes, I have been using GL5 in my Commando gearbox Apr 11, 2022 · I looked at a Hemmings document about gearbox teardown. Jun 22, 2014 · Kick start seals are prone to leaking. " There is a list of perhaps 30 pdfs, one says "Norton AMC gearbox animated diagram". Oct 10, 2024 · Norton Commando Forum . gear ratio (not shown in m. Aug 10, 2014 · i'm always on the lookout for gearbox/parts suitable for commando use but not clear on what all parts may be compatible? just looked at an ebay ad that showed a box for use on commando 68-74 understanding the e/start 75 is diff from the rest that mean an atlas, or other norton model use of Aug 9, 2005 · 12-200001 Bearing Kit, Gearbox Commando 1 6 - 134. I now have a pool of oil if left on centre stand. U. Sep 26, 2018 · Secondly, First gear won't engage. uk "The exclusive source of all genuine Norton Commando and Dominator factory spare parts. I see there is somewhat of a filter in the the oil tank. Close ratio versions of the gearbox are available. High quality built to the original specs. or its distribution inside of the box: on my recently aquired commando 750 `72, doing the oilchange of the gearbox, after draining it I refilled the box till the fresh oil started pouring out of the orifice of the level screw. Great deals. This is the main gear ball bearing in the AMC gearbox. Aug 12, 2007 · Hi, guys: Sorry if I bother too much, but I've done the gearbox over and over following the Old Britts advices, Haynes manual, and the Norton's workshop manual and replacing the gears it in neutral after checking the inner cover and quadrant position in 4th gear and all I get is that I can't move the gear shift and the bike is really hard to move as, even if the gearbox should be in neutral Dec 10, 2008 · There is minimal risk of water entering the gearbox via the tiny inspection cap hole due to the angle of the cap when fitted (unless you wash your bike with a high pressure hose). Mounting holes have become tapered from the middle as you would expect. The Best Gaskets for Norton Motorcycles Reusable Gaskets for Norton Twins JS Motorsport Gaskets are 1/32" thick reusable fiberglass reinforced silicone gaskets. The box on my Commando is smooth as silk from cold to completely warmed up while my Matchless G12 box (identical to the Commando) gets a little sticky after it heats up. I need to change the oil for the break in oil. Jul 14, 2014 · I have found that a 1654 bearing is the call number for a 2. My question is what would you use on paper gaskets to seal. also the gearbox main bearing seat was damaged - lots of free space to the bearing due to a gear wheel failiure. Many thanks in advance for all help given. The kick was pointing towards the ground :cry: I have had a "wining" sound on 2nd gear and was planning to do the gearbox next winter Apr 8, 2020 · Over filled gearbox will also cause that problem, I don't rely on the fill cube for the amount of oil, I use a messure cup and fill to the right fl oz the manual says to use, I found very early the cube for the level does over fill the GB, I also put grease on my clutch rod and since doing this I have had no more problems with GB oil getting into the primary case or clutch, so put the right May 21, 2003 · On the RGM website there is a section titled "TECH TIPS,HELP AND INSTRUCTIONS. H. Three quesions; Is it LH or RH thread ? What Whitworth size is it ? It measures approx. There is also a 4 and 5 speed extra heavy duty gearbox suitable for motorcycles such as the big bore Norton Commando, or similar high powered racing motorcycles as well as a special light weight option only for racing. The splined portion of the Quaife 5 speed mainshaft is slightly longer because the sleeve gear is narrower. Aug 17, 2015 · If the sleeve gear does not have the roller bearings then the Norton/AMC mainshaft can be used. Despite the eye watering cost of a new low gear set that is what I sprung for and that is why it was apart. A greater risk is the more vertical clutch cable entrance which is easily overcome by putting a spark plug rubber cap on the cable and sealing it to the gearbox. Here's the Question and pic below,,, The Ball Bearing 06-7710 for Layshaft has a inner race that comes out of the bearing. May 17, 2009 · They also manufacture 4 & 5 speed extra heavy duty gearboxes for use in big bore Norton Commando, Vincent HRD twins or similar high powered racing motorcycles. Revving a triplex with Norton torque1200-900 to put in gear . Would be really cool if Norton had come up with infinitely variable automatic. Put about 8 miles on her varying speeds up to about 50 MPH and copious gear shifting. Condensation builds up turning the oil an off-grey colour, obviously from condensation. My riding season begins and ends at below freezing temperatures so this is a reality for me. Dec 28, 2009 · Thank you to all who helped here. the exclusive source of all genuine norton commando and norton dominator factory spare parts Feb 7, 2010 · Typical items you need are on the gearbox rebuild kit. And that is what the gear drive on the Atlas engine probably is. I once purchased a Norton box which the owner had dismantled and could not remember how to re-assemble. May 14, 2007 #4 Norton Commando Forum. Still an original gearbox with nothing done to it but putting lip seals in the outer cover for the kick start and shift lever shafts. I note that for the AMC boxes from '57 on, the factory Matchless manual specifies 50 wt except for winter in Canada where the spec is 30wt . Chris Ghent (ghent. The old one is one piece bearing. Shown above as 040098 in the first post. Drain the oil tank and flush the oil tank filter? Drain Feb 18, 2018 · Like I say its my opinion and have rode and owned many British and Japanese bikes as well my modern Triumphs in the last 49 years and find the Norton shift is the best and on my Norton its the smoothest, but its up to what works with each other and of course its your own bike to do what work for you, to me its just easier to train your brain to know what bike you are riding and what shift Feb 7, 2010 · I rebuilt my gearbox over 35 years ago now to replace a blown layshaft bearing and have only gone back in to replace the kickstart pawl (4 times now), my gearbox has never leaked oil, I don't have problems with gear oil getting into my clutch and have never had kick start or gear lever seals leak, I replaced my outer screws with allen head screws and have never had them come loose at all, the May 13, 2007 · I'm rebuilding my '77 MK3 gearbox and I have just noticed that the circlip on the mainshaft, behind the gearbox sprocket, is missing on the parts catalog (or, at least, I am unable to locate it!). All the fasteners in the gearbox are Whitworth threads and require Whitworth sockets and wrenches. co. The internatls are the distinguished from the post 1932 Norton-Sturmey Archer gear boxes by the codes. Genuine Andover Norton stuff. Procedure: Nov 20, 2004 · just checking what the the proper capacity of the gearbox is on the 1974 850. Mike Aug 11, 2024 · The first table has the general starting serial numbers and the two right-hand columns list the approximate 750 Commando engine build dates as listed in Mick Duckworth's Norton Commando book that is available from Andover Norton. www. Just a bit of background first. Feb 18, 2007 · Where the drive side sleeve gear bushing rides, the shaft has been worn to 0. Massive selection from top brands on eBay. the numbers on the case are M18845. In simple terms I need to take the gear box apart and adjust the teeth on the quadrant and change mechanism one way or another so all gears engage. com May 8, 2022 · Hi, I'm new to Commando's and I've a Mk 1 850, I noticed oil mist from the 2 bolts at the front of the gearbox that are quite inaccessible but managed to get a spanner on them to nip them up only to find it feels like they're changing the gears upon turning the bolts !!!! what's going on and Jun 11, 2023 · Is there anyone on here using a TTI Gearbox? I’m wanting to order one for my 500 dominator and looking at the dimensions they give the commando set up is to long for a domi and different offset for the rear chain But seems to be perfect on the manx dimension for the rear chain! But my question I've used RedLine's 75W90 NS gear lube on many applications - with great success. The are threads on the Norton Owners Club discussing gearbox numbers and it appears the "N" prefix predates the "NA" prefix. Back on the road, better this time. The clutch cable entry point wandering all over the place to begin with. Jul 26, 2019 · It's been at least 15 years since I rebuilt the gearbox on my commando I replaced every bush / bearings etc including the layshaft roller bearing conversion and a Steve maney outrigger But the gearbox is in need of another rebuild The Kickstart is moving under exelleration It's noisier in second gear It doesn't like going into first gear Aug 22, 2023 · Bruce, That's a very nice looking set of pullers. Jul 7, 2024 · Yes it is the RGM clutch adjuster. book says . Yes i had a gearbox problem, the stuck in gear one, but after talking to Sean at Norton and Jan 20, 2009 · Anyways I've never seen this type of bearing before in a Norton Gear box. The gearboxes on my 1961 Matchless G12, 1961 Norton Dominator 88 and 74 Commando are identical except possibly for gear ratios. Jun 13, 2023 · Hi Steve first gear was anti clockwise and 2-5th clockwise as I’ve just double checked my email. I was in the process of replacing the crankcase primary drive oil seal on my 1972 750 roadster when I found the gearbox main shaft had excessive sideways play and it looks like the previous owner forgot to install the outer sleeve gear bush, so not looking forwards to seeing what the gearbox internals are like. on my 72 Commando. Aug 21, 2012 · Like with the Norton Timing Cover there are multiples of options for the gearbox outer cover if you include some AJS/Matchless, Commando, Dominator and Mercury versions. Wow, was it tight. The old one is bent and I would like to replace it with a new one. 6203 instead of the shorter bushes 040062's . uk Pretty simple, clamp spindle with aftermarket clamps or buy cradle with cotter pins. If you remove the three cradle to engine mounting bolts and push the engine out of the way, the gearbox will come out. Feb 13, 2013 · I noticed a bit of play on the 1st and 2nd gear bushes, so I ordered a couple new ones from Old Britts. Now of course this is probably because it hasn't been squeezed by the interference fit of the gear. in my Commando. 5 cu in), in 1973 it became an 850 cc , actually 828 cc (50. h. Oct 31, 2009 · I'd often start off in 2nd and skip 3rd to hit 4th for normal-ish riding range. I am considering drilling/reaming 1/16" increase in Jan 8, 2017 · I need to remove the gearbox sprocket from my 1959 model 50. looks like gearbox apart. See below. N8XXX for the later boxes and EIV XXX for the early boxes Feb 6, 2014 · Previously robert_mackenzie wrote: I have had my 961 for about 9 months and in that time i have loved and attimes questioned it. EIV 130 signifies a pre 1932 Sturmey Archer gearbox. I have new bushes in the main gear and now have replaced the layshaft ball with a new roller brg. com. Using a fresh design approach, they have built a completely new and modern, quick changing & reliable gearbox. I've not put it back together correctly. Finishes and blingy fasteners drive cost as well. I can't imagine that oil suitable for extreme pressure service is detrimental to brass. I was able to lever the knuckle in the gearbox slot through the full range of gears and then left it in neutral. not actually a good buy. Jul 1, 2009 · I believe the AMC gearbox was introduced about 1957 and used on all the AMC motorcycles (Norton, Matchless and AJS). gearbox mating surfaces are flat and nuts are tight. Dec 28, 2008 · According to my Norton Maintenance Manual: "With this frame,it is not possible to remove the gearbox as a separate unit and if, therefore, it becomes necessary to remove the gearbox shell, then it is essential to lift the engine/gearbox assembly from the frame as described in para. . the guy doing some mashining on the motor said, he can reinforce the case by deposition welding and rebore the main bearing seat in order to use a needle bearing, leaving more meat between the bearings. Apr 15, 2021 · While in the process of overhauling my 850 gearbox; sn 306XXX, the "sleeve gear bearing" dropped out of the gearbox shell. Oct 19, 2017 · Around 2014 and tighter tolerances. It would be great Plan on $2500 to $4500 for a motor redo. VIP MEMBER. uk. 001". I have . This will make sure that the quadrant does not hit the case when either 1st gear or 4th gear position is selected. net. Everything was Oct 28, 2014 · The plunger in my gearbox was not moving fast enough due to just being a crude rough part and old trapped unfiltered gearbox lube in the plunger piston bore. Meaning separate motor and tranny. "Table 5, a viscosity equivalent chart, provides a comparative illustration of all of the grades shown in tables 1 through 4. The slick-shift internal mechanism can be removed and used as a standard, but only the pre-unit inner and outer covers will fit on the case, not unit. May 14, 2007 · No need to remove the bolt and let oil dribble down the gearbox. Mick's own words from the NOC video: Dec 3, 2012 · It's the 850 Mk3 cradle where the gearbox can be removed without having to move the engine (either 750 or 850 I believe, as described in the factory manual section D7) as the Mk3 had the fixed gearbox, therefore, no need for the pre-Mk3 adjuster so the hole in the cradle plate was enlarged where the adjuster would've been on the previous models. britcycle. Pretty much everything that is in the mkii other than the seat was done between 2014-2015. Joined Aug 21, 2006 Messages 748. I have done this on the kickstart shaft and it is a complete success. With the lever adjuster fully closed, the clutch adjuster on the clutch goes in until it touches the rod and is then backed out a full turn. TTI manufactures 4, 5 and 6 speed heavy duty (standard) gearboxes for AMC, BSA, Burman and Triumph or similar classic motorcycles. This particular video shows Aug 28, 2023 · Complete Norton Commando gearbox rebuild kit. First about the bike, it is a 2010 961 sport that i bought used with 2000 miles on the clock,and the previous owner had it built as a 961se as he missed the first run of 200. 31. Sep 18, 2017 · Mick Hemmings recommends the FAG 6203TB P63 phenolic cage ball bearing over the roller as he says (in the NOC Norton Gearbox Servicing video) that he's never known one to fail even under racing conditions. I will try adjusting the linkage first before centrering the gear selector. The gearboxes are stripped, carefully checked and an estimate is produced for the work and parts required for the rebuild. Andover Norton International Ltd . It has been mentioned in the INOA Tech Digest as a good idea. Suggestions?. Jul 19, 2003 · I found that the speedo gearbox has indexed by about 30 degrees clockwise and that grease that looks like it came from the speedo gearbox has spread out radially over the rear hub cover. Feb 8, 2020 · In answer to Storm42: A few weeks ago I was babbling on about gear ratios in low and over all ratio ie high gear. then going to a renold drive chain(510-520) it's c common thing who don't realize the unapproachable norton. Fits most Norton models from approx 1962-1975. I would replace the two 4th gear sleeve gear bushes with the longer Mk III's, 06. Best resource tool in your toolbox. So is the bolt I have still the original one? The bolt has a magnet in the core on top. Oct 28, 2009 · Norton boxes stamped N#### were built from 1957 - 1962. Gearbox mounting holes enlarged so that 1/2" lower and 9/16 " upper are sloppy enough that the gearbox can twist at least 5-10 degrees in the cradle. 1. There's two options, the slick-shift and the standard shift. 25"ID x 5/8"wide ball bearing that seems to sell for $5-10 on ebay. Along the way we replace bearings and seals and gaskets. New posts New media New listings. May 9, 2013 · First of all, thanks to everyone for helping me figure out the rich fuel condition I was experiencing. It does have a lighter feeling shift, especially in cold weather. 5" A/F. uk Nov 10, 2012 · 5-speed gearsets for Nortons have been available in a variety of close-ratio clusters, with similar gear ratio spreads from 2nd to 5th gear, but with first gear ratios ranging from 1. Is a box spanner 'man enough' to move it or do I need a ring spanner ? A socket is unusable on it. Maybe the felt seal failed and as the grease emptied from the gearbox the gearbox seized. Jul 25, 2023 · Hypoid grades 80 and 90 are roughly the same viscosity as engine oil grades 40 or 50 at gearbox temperatures. Nov 4, 2007 · The gear selection "positivity" is, I have found to be, dependent on how well the ratchet spring is set up. Jul 14, 2014 · Norton recommends EP (extreme pressure) 90 oil in the gearbox. You can also buy all your overhaul parts from Old Brits. Jun 9, 2021 · a question about the gearbox oil quantity I`m a bit concerned about the correct quantity of gearbox oil. The late Norton gearbox must be one of the best-known units ever made, although it was in fact an AMC design. May 13, 2010 · Changing gearbox oil regularly is a reality for anyone who rides their Commando in cold weather. Jim Jan 2, 2025 · Morning chaps - im trying to identify the gearbox that i have so i can order the bolts to fit it. For those of you keen on a race motor, we collaborate with Kenny Cummings at NYC Norton. Time to get a new drive shaft? Jul 12, 2020 · Andover Norton Gearbox Outer Cover. One is casted one is machined from solid. print their teardown/overhaul instructions and folow them step by step. Sep 17, 2013 · Norton gearbox overhaul . tables). gap between the gearbox spring arm and the pawl. The Norton Commando is a British Norton-Villiers motorcycle with an OHV pre-unit parallel-twin engine, produced by the Norton Motorcycle company from 1967 until 1977. thanks, Eric Feb 14, 2024 · Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002. Shut down and went through gears by rocking the bike. I changed mine out 10 or 15 years and 20,000 miles ago and have not had any problems (but then, I wasn't having any problems with the bushing, either). 4126 Aug 25, 2024 · Hi TBW I have just done the same thing and built an earlier race GB back to road use for my '68 commando while I rebuild the original and the covers will fit but if you use the cdo KS shaft and spring you will need a commando cover ,the bigger spring fouls on the outer cover . Once you get it right, it is a very nice gearbox. Apr 10, 2010 · I assume you are talking about the speedo gearbox on the rear wheel. Examination of the seat of the gearbox shell showed that the bearing seat had been upset (with a center punch) around it's entire circumference. Norton boxes stamped NA#### were built from 1963 - 1968. With a road bike, I would not go down to first gear when stopping. This video is part of a series covering the full strip down and rebuild of a MKII 850 Norton Commando engine. 17-3. 070" end play at this time and I am concerned about the advised shim install, at the kick start, moving the kick start mechanism too far out of its latch. However, where the timing side sleeve gear bush rides, the bushing has worn the drive shaft down to 0. Low oil level and dirty oil are detrimental to brass. A side note that came out of my inquiries was ancient racers before belt drives having triplex chain seizures if using primary oil above 20 grade 'weight'. Normally the 2nd and 3rd bushes are OK to leave but make sure they are a sliding fit in the gears. The *NS* lube is a GL-5-type oil *without* the limited-slip differential additives. I watched this video and the chap on the bike to select 1st gear pushes down, on my bike and according to the manual my first gear is up then 3 down. All are 1:1 in 5th gear. " May 26, 2010 · No. 0808) - 06. About to give up. 42 litres or a hair under a US pint. Forums. Gearbox cover seal modification - very successful. Cdo are so board range power unless trying for max G's on cam constantly, another gear or 2 is just something else to distract from lovely thoughtless flowing Commando. 5 cu in). andover-norton. Not sure about the inner as mine had the modified inner cover so was replaced also lay shaft shortened and no KS shaft . Neil. May 1, 2006 · In the old-britt they refer to 040138 NORTON, Bolt, 3/8 x 20, 1/2", Gearbox Drain Bolt. My own rather agricultural technique is to heat the gearbox case in the oven for about half an hour with the drive side facing up - often the bearings simply fall out once a decent temperature is reached, but if not I put on a pair of oven gloves and using a wooden chopping board I simply bring the case down sharply on the studs against the Oct 6, 2020 · 1974 Commando Mk2 w/recently rebuilt gearbox. 92 Yes but RGM do seem to list an overhaul kit for GBP114 - I guess either it is not as complete, or it proves it pays to shop around. 8072" or near 0. I've placed the bike on the centre stand and ran it in second gear with the wheel off May 31, 2008 · Had to use breakdown service last night, gears got "stiff" (but not stucked) on 2nd gear. Will I need to remove the primary side thoughto do this. Get Mick Hemmings DVD. I dropped the needle one notch and turned the air screw in until the flat spot went away. Note that he lists very specific starting serial numbers that often do not match what others have published - who Jul 26, 2008 · 1) when the gear box is rebuilt, the first gear has to be timed in a certain position ( the manual is reasonably clear on this ), 2) the plunger need to be set correct, correct spring etc etc ( the plunger pops into a different slot for each gear and neutral ). Nov 17, 2014 · It was second gear that was the culprit Norton went from an 18 tooth to a 19 tooth on the mainshaft with the layshaft cog remaining at 24 teeth but a different diameter depending on whether it was meant to go with an 18 or 19 tooth mainshaft gear. Cheers Jan 2, 2025 · Morning chaps - im trying to identify the gearbox that i have so i can order the bolts to fit it. Nov 4, 2005 · Notably, the Norton shop manual lists various acceptable gearbox lubes and Hypoy was one of them. As yours has the plate for a handchange I would guess that it is 1929-30. The frame was recently straightened my Motoliner Maidstone and has been powdercoated black with the swinging arm and engine cradle. This fact even eluded TTI (the New Zealand gearbox manufacturers) I ordered an extra heavy duty 5 speed box as a direct replacement for the box in the Mk3 that will have the Merlin engine fitted. Thread starter mdt-son; Start Andover Norton - GEARBOX SHELL (NOT MK3) (06. Norton Commando Forum. It loves methanol, even at low comp. They were designed for hypoid bevel gears in car back axles, where the eccentricity of the input drive puts big sliding movements on the gear contact Oct 18, 2009 · If the primary is two tight, the when it goes in gear,the drive chain will snap. The Oldbritts document "Assembling the commando gearbox" covers this in the last three pages - may help you (it did me!) PM me with your email address if you'd like a copy. The only other thing is all I've ever used is 80-90 or 85-90 gear oil. Jul 28, 2020 · But the Commando engine is different and possibly better. Insert the top hat spacer into the wheel bearing, then place the gearbox over the lip of the spacer (brim of the top hat) this provides clearance for the wheel to spin without This is one of a series of videos covering the full dismantling, restoration and rebuild of a Norton Commando engine and gearbox. New posts. Sep 21, 2020 · Dear All. Attachments img00937-20170105-1548-jpg The same AMC gearbox was used on all Commandos, the only change being that from 1974 onwards there was a small difference in the 2nd. the exclusive source of all genuine norton commando and norton dominator factory spare parts Shop Norton Gearboxes & Parts with eBay Guaranteed Fit. 3 Old Farm Buildings Standen Manor Estate Hungerford, Berks. Background, 71 750 Commando newly rebuilt engine. I already knew about the slop, but hadn't yet zeroed in on the Sep 14, 2021 · I have clearly changed the linkage relationship in some way - bent slightly of mal-adjusted it. Does the hat side of the race fit next to the gearbox case or on the shaft. 36 (Quaife Road set with kick start provision). d. coveoezd axlnpf onk ecxu ujqf pcchebd dfiw vsvuq bferwtr jztqv