Sign in to follow this  
Followers 0
sprint4425

wierd engine sound..piston slap?

4 posts in this topic

I have an '03 yz450. When i let the engine idle there is a slight knocking or slapping sound from my engine. Once i crack the throttle the noise seems to go away, but that might just because the exhaust is too loud to hear it.

Anyone have any idea's?

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