450FX, when to check valves

Bike has 11 hours on it now, prepping it for labor day weekend dirt shredding.  Should I be checking the valves yet?  I seem to remember 20 hours being the starting point on my 06.  Yes I've read the manual and know what it says, FYI.

I have 45 hours on my FX, starts so easy still. I'm waiting for winter to check. I personally wouldn't worry about with those low of hours. I should have took a reading when I first got the bike,o'well.

Edited by RMK800

I have about 1,500 street miles on my 16 WR450, and they were all in spec. The right intake valve was at .14 (.13 is spec) left intake was at .152, exhaust valves both dead in the middle. 

Occasionally, a new valve and seat combo will experience some initial "settling".  Doesn't happen often, but it never hurts to check.  Bear in mind Yamaha has always tended to build to the minimum specified valve clearance.  Just because they are at or near minimum is no reason to disturb them.

At 70 hours I had one intake valve slightly out of spec (tight). The rest were good and where actually at the high end of the spec threshold

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