Sign in to follow this  
Followers 0
brandonmotocrosslife

ringing while idling

15 posts in this topic

hey so after my bike had been sitting around for about 2 weeks and i started it up fine but when i was reving the bike in neutral i heard some ringing coming from the clutch box like maybe some plates had been worn or something. so i opened the case to inspect the plates and everything looked fine. i also checked the kick starter idle gear to see if anything was lose there and nothing was loose. so i made sure everything was in correctly including the torsion spring which was a pain in the butt to keep in it's hole and put the bike back together. i did an entirely new oil change including the filter started it up and it was still making the ringing noise....

 

any ideas to what it could be??? thanks

Share this post


Link to post
Share on other sites

Model and year would be helpful.

 

And maybe a video clip so we can hear the sound.

Edited by woods-rider

Share this post


Link to post
Share on other sites

without hearing it in person, initial feeling is crank bearings. really no way to tell without some investigation. Go buy a cheap harbor freight stethoscope and start listening to areas around the case, cylinder, head, etc.

1 person likes this

Share this post


Link to post
Share on other sites

Make sure it isent something stupid like the top of the rear shock .locknut not tight .or shock bushings beat .hope its something like that .bill

1 person likes this

Share this post


Link to post
Share on other sites

your 100% sure its internals motor not external?

yup

Probably something loose on the exahust

no everything is nice and tight i had to take the exaust off anyways to get to the clutch plates

Share this post


Link to post
Share on other sites

There is an intermediate gear between the clutch hub/clutch shaft and the crank shaft. The nut can work it's way loose and sound like jangleing change (Aussie change that is). You have to pull the R-H engine side cover to access it.

 

Had this happen on two of my Yamaha 4 strokes. The nut will not come completey loose as there is a lock washer (similar to the CS sprocket nut lock washer) that prevents this but it's still anoying none the less.

Edited by JDLowrance
1 person likes this

Share this post


Link to post
Share on other sites

Ya, agree with bashplate.  Let it idle and simply put your hand on the plate.  See if the tone changes.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0