Quote:
Originally Posted by mecscc
These bikes, when perfectly set up, sound like a bunch of ball bearings rattling in a can, and any change in sound can catch your ear, but that doesn't necessarily mean its bad. If they changed a few shims there will be a change in sound. What I don't get is how the ticking got louder when they "tightened" the clearances.
Anybody have a guess on that one?
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The only thing I can think of is the oil viscosity. Was an oil change done on the bike? Did they use a thinner oil. It really shouldn't make much difference since the bikes have a mechanical valve train and will rattle anyway but it is the only thing I can think of. Tighter clearances should give less noise.
My bike will be fairly quiet just before I shut down after a run. If I park it for 20 minutes and start it up, the top end sounds noisy for a few minutes then quiets down (Maybe it's just me getting used to the noise). If I start it up in the morning, it sounds relatively quiet. I really don't get bent out of shape about it. Mechanical valve trains are noisy by nature.
One other item to consider is cam chain tension (too loose-I had this problem on my Yamaha). What if the cam gear tensioners weren't properly tensioned?
