HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
Big Ed 1

Checking Valves - Have question?

3 posts in this topic

First post but do alot of reading. Couldn't find any past post to answer my question. I have an 06 YZ450 that I bought used, raced motocross last season & finally getting around to checking the valves. The bike ran fine, made plenty of power, but occasionally the bike would be hard to start when warmed.

I went throught the proper procedure at getting the piston at TDC, making sure the I mark is aligned with the crankcase cover. After doing that, the cam lobes are pointing at each other, not away from each other as stated in manual. And the alignment marks on the cam sprockets are on the inside and not on the outside as in the manual.

Is this correct or is everything off by 180*. I can provide pic if needed be. Sorry for the long post. Thanks in advances.

Eddie

Share this post


Link to post
Share on other sites
First post but do alot of reading. Couldn't find any past post to answer my question. I have an 06 YZ450 that I bought used, raced motocross last season & finally getting around to checking the valves. The bike ran fine, made plenty of power, but occasionally the bike would be hard to start when warmed.

I went throught the proper procedure at getting the piston at TDC, making sure the I mark is aligned with the crankcase cover. After doing that, the cam lobes are pointing at each other, not away from each other as stated in manual. And the alignment marks on the cam sprockets are on the inside and not on the outside as in the manual.

Is this correct or is everything off by 180*. I can provide pic if needed be. Sorry for the long post. Thanks in advances.

Eddie

Your at TDC on the exhaust stroke you need to rotate the the crank 360 degrees then the cams will line up correct.

Share this post


Link to post
Share on other sites

My advice? take alot of pictures if its your first time doing it and you are not confident. That way you can put it back together and compare, as its easy enough to get it mixed up

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