Personally, I doubt that it's the clutch. There isn't really anything to 'snap' like that on them. As has been said already, you need to start at the rear wheel and work forward, eliminating each possible reason. You have the bevel gearbox at the rear wheel...does it have oil in it? Then the UJ joint..... Is it in good shape? ..the middle gearbox could cause crunching if no oil in there, so have a look at that....
If all is fine as far as the bike gearbox, then it's the transmission inside the bike somewhere.
UJ joint does sound a strong suspect in this inquiry!
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This will be a process of testing and elimination. Starting with the easy to get at stuff first. If the drive train is intact up to and including the middle drive then you need to have a look inside the clutch cover. This can be done by placing the bike on the side stand, that way you don't have to drain the oil, but at this point I would probably leave it on the center stand and drain the oil anyway just so I could rotate the rear tire while in gear to help find the source of the grinding. If it's coming from the bottom end then it's tranny trouble and the fix will be a bit more complex and time consuming. But don't panic yet, we aren't at that bridge yet. I'm stll betting on the U joint.Leave a comment:
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Drive train
Put the bike on the center stand and make sure it's in neutral. with the motor off, try to rotate the back tire by hand. This should tell if the drive train is intact up to the middle drive. If it won't rotate w/o grinding then slip the rubber boot off and remove the four bolts securing the drive shaft to the middle drive then try to rotate the rear wheel again. Could be the U joint by the sounds of it, but the middle drives do fail once in a while. The smell of burning rubber has me puzzled. Clutches don't usually fail that abruptly unless there is a catastophic event, but in that case it most likely wouldn't be spinning the disc's.Leave a comment:
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Something snapped! A diagnosis.
I had just pulled out of my parent's neighborhood today on my way home when, accelerating in first gear, I felt a violent "snap" of some sort. I pulled over to the curb and turned off the bike. After taking a moment to compose myself, I started the bike back up. The engine runs fine, which was a relief. However, whenever I put the bike in gear (I tried first and second), I'd hear a grinding noise accompanied by a decided lack of power. By that I mean that the bike would not move at all. It stuttered forward a bit, but applying any throttle at all in gear would result in that grinding noise, a burning smell, and severe distress on my part.
I'm hoping it's just my clutch, but violence of the "snap" I felt has me worried. Unfortunately, I had music playing in my helmet so I was unable to hear whatever noise followed the break.
Help me out here and tell me it's just my clutch.
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