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
aremean_troy

yz400f head on a yz426 engine?

5 posts in this topic

I am planning to buy a blown up 2001 yz426f engine (needs a new cylinder head assy).

So my question is, will a 1999 yz400f or 2000 wr400f cylinder head fit the yz426f? I would appreciate it if someone who will be going to the dealer can enquire for me cos the yamaha dealer here in Singapore knows NUTS!

alternatively, have anyone ever did the above?

Thanks

Share this post


Link to post
Share on other sites

Same chamber volume.

Bolt on swap.

Depending on the failure of the old head it could be repaired.

Many shops and wrenches are unaware of good cylinder head specialists that can weld up and rebuild most heads due to common failure issues, ie dropping a valve, seats falling out, cam bore seizure, bucket bore seizure, freeze cracks and the like.

All repaired for less than the $$ of new.

Share this post


Link to post
Share on other sites

thanks for the both reply, what I understand is that the 1998-1999 (400) have a bore of 92mm whereas the 2000-2002 (426) have a bore of 95mm.... wont this cause any mismatch at the head and cylinder joint? :cry:

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