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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.


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  #1  
Old 09-04-2012, 09:20 AM
Koko Koko is offline
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Default Help identify this drivetrain noise...Please.

Sorry for my numerous posts everyone. But I have no one close by who is into 2 strokes or off road riding in general. Thus, the only way I learn is by asking all of you the pros to help me out.

The video below is a noise my bike is making. The tranny is in neutral. The noise seems to be coming from the rear wheel. It spins easy. But you can "feel" this noise. I just can't tell where it's coming from.

I hoping it's not coming from the tranny and just making the noise sound like it's out back. The chain rollers seem to roll easy and the rear bearings seem nice and tight. Driving the bike it seems perfectly find. No shifting issues, etc.

Or am I just newb and this is normal free wheeling drivetrain noise?

http://fototime.com/90ADC0A8A18DC8D/convx264.mp4



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Old 09-04-2012, 09:55 AM
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How are the chain and sprocket. That is not a normal noise. Is the rear wheel aligned properly?
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Old 09-04-2012, 09:58 AM
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I'll check tonight in terms of alignment. Chain and sprockets look good to me.
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Old 09-04-2012, 10:59 AM
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chain tension too tight?
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Old 09-04-2012, 12:31 PM
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I don't think so. If anything, it may be on the loose side. I'm going to pull the chain tonight and see if the noise in the wheel, front sprocket (I hope not), or the chain rollers.
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Old 09-04-2012, 12:41 PM
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sounds like the chain / sprocket, chian trying to jump the sprocket...does it make the same sound when turned the other direction?

P.S....whats up with the "Clay" quote in your post?
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Old 09-04-2012, 01:10 PM
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It was a just a sarcastic quote meant to be funny, which sure did make me laugh. So I quoted it in my sig. I should probably remove it, I don't want people to think that's the truth. LOL

To answer your question, yes, it does make it in both directions.
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Old 09-04-2012, 02:23 PM
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If it was my bike, I'd pulled the wheel off, inspect the wheel bearings, seals, make sure you have the spacers on the correct side, if not the offset will be wrong and you may have a brake rotor bolt hitting something.

With the wheel off, you can rotate the c/sprocket and take a listen.
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Old 09-04-2012, 02:33 PM
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I think one of you drive side bearings is shot
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Old 09-04-2012, 07:06 PM
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Its easy to isolate mate. Start by grabbing the rear wheel at 9 and 3 oclock and move it in a push pull action. Should be no play. If there is the wheel bearings are toast. Next pull the axel and the rear chain roller, take the chain off the front sprocket. and hang it over the outside of the swing arm. You can now test the front sprocket to make sure the noise isn't coming from there. Put the back wheel back on without the chain on and turn the wheel and see if it clicks just rolling on the axel.

Things that come to mind for me are the following. Either wheel bearings are shot and its clicking as it grinds over. The brake caliper/swingarm mount is worn and its grabbing and releasing (you will see this turning the wheel like in your vid), or the axel blocks aren't straight and the chain is running at a different angle and putting a side load on the sprocket.
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