Sign in to follow this  
Followers 0
RocketRoss57

replace cam bearings on 99 yz400f??

11 posts in this topic

You could, but the cam sprockets are press fit without keyways, so if they are removed, they have to be re-indexed manually in order to get the cam timing right. Neither Yamaha nor the aftermarket sell the bearings separately for that reason, although you can probably cross reference them.

Share this post


Link to post
Share on other sites

Any motor builder in the country can do it for you for pretty cheap. It's not something you can do at home without the proper knowledge or tools.

Share this post


Link to post
Share on other sites
i never really heard of cam bearings going out.
Ordinarily, they don't. The bearings will outlast the cams by 50% at minimum.

The cost of the bearings will be minor compared to the expense of having them properly installed.

Share this post


Link to post
Share on other sites
the tools to do a job like that will be expensive too, right?

You need a press, and some means of correctly re-indexing the cam sprockets within a degree of where they belong. Furthermore, the sprockets should not be removed and reinstalled without tack welding them to the camshaft for security, as the press fit will be weakened slightly by the operation.

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