| Author | Message | ||
     Ezetom |
Hi Folks, I just recently bought a 99 M2, and after about 200 miles (and a primary oil change (amsoil 20-50)) the transmission oil us full of metal, and is noisy as can be!... It still seems to shift fine, and seems to work normally, but man is it loud! Ive grabbed the output pully and it seems tight,, so it must be some other bearing or something.. Anyone have any ideas/suggestions? Thanks! Tom | ||
| Reepicheep |
You likely have a broken primary chain tensioner. The factory replacement part is upgraded. (It might just need adjusting, but if you don't have positive confirmation the original was replaced, you should go in there and replace it). Easy job, you just need a new tensioner and primary gasket. | ||
| Akbuell |
First thought is a loose primary chain. Too loose, and the chain can 'slap' against the primary cover. Quick check - Is the metal magnetic? If not most likely primary cover shavings. If it is attracted to a magnet, then start looking at gears, bearings, ect. Hope this helps, Dave | ||
| Reepicheep |
Oh, and run your belt scary loose. (And by scary loose, I mean that with the bike loaded you can push the belt to *just* touch the swingarm). | ||
| Ezetom |
Hi there, I dont think it is the chain tensioner.. Because when I pull the clutch, the "wirring noise" stops.. Also, when Im stopping at a set of lights, I can hear "gear noise" that seems to follow the speed of the bike as it slows down. Also, I have adjusted the primary chain, and its within spec all the way around. Are there any "bad things" in the tranny that fail often? Tom | ||
| Bluzm2 |
Check the primary tensioner! | ||
| Reepicheep |
You don't want to know what "the other possibility is". *cough*5th gear drive assembly needle bearings*cough* Which is related to why I suggested run the belt scary loose. The good news is you have a cartridge style transmission. But really, pull the primary cover off first and make sure the primary chain tensioner is not cracked and is the updated thicker metal backplate version. | ||
| Ezetom |
I just had a look through the service manual again, I think Im gonna pull it all apart and see whats up... probably the best way. Ill see if I can post a video of the noise in the next couple days Tom | ||
| Ezetom |
Ok I found a used transmission from a 2007 sportster for a reasonable price. I went and looked at it last night and it looks decent, and has helical gears. Does anyone know if this will be compatible with my 99 cyclone? Tom | ||
| Reepicheep |
First, you don't know what's broken. Your two most likely candidates (split primary chain tensioner, or failed 5th gear drive assembly needle bearings) aren't likley to come with a "spare transmission" anyway. Secondly, I don't know, but i doubt it. The 2007 sportster likely does not have a trap door transmission, so it seems unlikely the parts are the same. | ||
| Akbuell |
I'm with Reep on this one. No sense getting too far ahead until you have an idea of what is/has failed. Plus, the basic guts of the trans are pretty stout. Put a piece of rebar through the rear axle, and rest the ends on blocks or frame stands so the rear tire is off the ground. Pull the primary cover after draining the trans. If the primary tensioner is broken, that will be obvious. If it is not, then put the trans in neutral, then go to the right side of the bike and turn the wheel by hand. Listen at the engine pulley for crunchy sounds, and see if the wheel feels rough. If so, the 5th gear needle bearing is most likely the culprit. If that is the problem, the trans comes apart fairly easily, and if you need to, taking the bike to a reputable shop where everything is already apart, and all that is needed is to remove/install the output shaft, not bad at all. The service manual is you friend. Hope this helps, Dave | ||
| Ezetom |
Hi Dave, Thanks for the advice. Im gonna start to take it apart this weekend. In the meantime, I'll try and post some videos of the sound it makes tom | ||
| Ezetom |
So I rebuilt the transmission... The only real problems I found were the mainshaft bearing in the trap door, and as well the clutch release bearing... I changed all of the other bearings, including the the split needle bearings, and all is good. FYI you can buy all of the bearings commercially with exception of the split bearings... FYI if you buy the output shaft bearing from HD.. beware.. it is a chinese pos.. I will post all the commercial bearing numbers shortly I know people will scald me, but I used an impact wrench to remove the crank nut, (and install it as well  -Tom | ||
| Kenny_gilgore |
Tom, What kind of impact wrench did you use? Kenny G | ||
| Bluzm2 |
Tom, look forward to the bearing numbers! |
