Motorcycle cam chain rattle?
I have a 2008 Honda XR 125 L-6 and the engine rattles slightly at idle. It isn't very consistant and completely goes away when i slowly release the clutch to biting point. Anyone know what it is? Is it the cam chain?
Check the chain adjuster/adjustment. Some machines make a little noise when cold.
It could be a link in the chain is loose. Sometimes the rivets that hold the chain links together become weakened if small pieces of gravel hit the chain itself. It might be an idea to really clean out the chain of all the gunk and collected grime and remove bits of sand or grit and oil it all over again. Just a thought.
Yo. The bike needs a complete overhaul by a certified mechanic, Get 'er done or sell the bike. Your riding safety is on the line.
Although these little Hondas do like to chew on cam chains and tensioners, if yours was shot it would make noise all the time, getting louder when you rev the motor and the centrifugal forces lift the chain off the sprockets.
I would say your fault is within the clutch basket and/or bearing if the sound goes when the clutch is loaded up.
Sounds like a bad clutch basket/pack or a bad clutch basket bearing. Open the right hand side crankcase cover and inspect the clutch basket. It might need a replacement.
Get hold of a copy of the manual & adjust the cam chain tension as per the book. Early Hondas had a rep for rattly cam chains.
If the noise goes when you let the clutch take up I suspect it's the clutch basket. Easy t oget to & check -(again get a manual & a few DECENT tools)
Sounds like a worn clutch thrust bearing, not the cam chain or cam chain tensioner.
Might be the oil. I don't know if yours uses a hydraulic tensioner or not. Cheap insurance.
Some bikes have a chain at clutch basket. This might be what you hear if it goes away with declutching.
Get a New, Unsharpened pencil, put eraser end on your thumb, then your thumb in your ear. Poke around engine with its tip. If the sound is near or below clutch, it isn't cam chain; that is on one side of cylinder.
Thanks everyone
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