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Sportster Motorcycle Transmission, Clutch, Primary & Secondary Drive Transmission, Clutch and primary or secondary drive problems, advice, and/or how tos.

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  #1  
Old 27th July 2012
rontech rontech is offline
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Default Strange noise coming from primary

The bike makes this squealing/rubbing noise only when the bike is moving, and the noise slows down when the bike does. I just replaced my clutch adjusting screw assembly bearing about 3 weeks ago. Is it possible for this bearing to fail after only 500 miles or so or could it be the clutch hub bearing? Has anyone had a clutch hub bearing go bad? If so, what were the symptoms? Other than that the bike runs fine, shifts good, etc.
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Old 27th July 2012
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Originally Posted by rontech View Post
The bike makes this squealing/rubbing noise only when the bike is moving, and the noise slows down when the bike does. I just replaced my clutch adjusting screw assembly bearing about 3 weeks ago. Is it possible for this bearing to fail after only 500 miles or so or could it be the clutch hub bearing? Has anyone had a clutch hub bearing go bad? If so, what were the symptoms? Other than that the bike runs fine, shifts good, etc.
Primary chain too tight?
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  #3  
Old 27th July 2012
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Check your drive belt adjustment. Too tight?
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Old 27th July 2012
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You sure it not coming from your brake rotors? Probably not if it is squealing.
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Old 28th July 2012
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Primary chain is within specs. I checked it when I replaced the throwout bearing. I don't think it's that anyway because the primary chain moves with the engine RPM's. This noise slows down when the bike does. It's not the brakes, they are fine. I checked the final drive belt a few weeks ago, it was within specs. I'll check it again. The noise seems to be coming from the primary, I'm leaning towards the clutch hub bearing. Don't know until I can get it apart. Don't have a clutch spring compressor tool, no one around here seems to have one. I do have access to a complete CNC machine shop, I could easily make one, if I knew what it was that I'm making. I need dimensions. I'll check the final drive belt again, maybe the compensator sprocket. I hope to have it fixed this weekend. I have been relying on the bike for the commute every day since my truck got wrecked 2 months ago, so I need the bike to stay operational until I can get the truck bodywork repaired. Since I have to ride the bike all the time, it's a real PIA when I need to do any work on it.
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  #6  
Old 28th July 2012
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Only when the bike is moving and changes with engine rpms. Hmm. I'm still gonna say check belt tension like I mentioned earlier, but also check for anything making contact with a tire under a fender. I've seen where the rear wiring harness under the rear fender came loose and was hanging down making contact with the tread of the tire as the wheel rotated. Also have seen rear fender hardware make just enough contact with rear tire sidewall to make noise like that. Just a couple of thoughts. Wheel bearings?
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Old 28th July 2012
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check your front sprocket nut too. they can come loose.
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Old 28th July 2012
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I don't have time to give you the links. check out my profile's threads posted about the same thing. we found the answer. Flame retardant also has a thread to fix your prob.
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  #9  
Old 31st July 2012
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I went for a ride, leaned waaay over so I could try to pinpoint the noise. It isn't coming from the primary. It seems to be coming from the rear wheel. I get bike home, jack it up, turn wheel by hand. Must be wheel bearings, but there is no noticeable play in the bearings but they seem to make a "groaning" noise about every 1/2 revolution of wheel. Wheel bearings? Checked belt tension, it's good. Rear wiring harness isn't touching tire. So I let bike down off of jack, proceed to ride down the street to pinpoint the noise again, this time the noise disappeared. Been riding the bike for 2 1/2 days without the noise, now it started up again, but not as loud. Looks like wheel bearings are on the list...
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  #10  
Old 31st July 2012
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Told ya

Haha, but really, post a follow up after replacing 'em. Let us know is that took care of it.


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