Sign in to follow this  
Followers 0
peaceofwork

questions about buying parts for a yz400f or 426 head

3 posts in this topic

are these heads the same core and do all parts interchange?

i have been studying up flee-bay watching guides valves springs and retainers and keepers but the years the suplyrs say their products will fit is bafling me

i know stanles steel valves take heavyer springs and that posibly the 2000 426 came stock with steel valves but what do i really need to know before i order to redo a head?

i,ve seen stock yamie valves are going kinda cheep but will they all work well in eather a 400 or 426 head ?are their any differences i should know about?

Share this post


Link to post
Share on other sites

Going by the part numbers and diagrams on the 1999 yz400f and 2000 yz426f. The valves/spring/retainers/buckets are all the same, the only real difference is the head core.

400 - https://www.thumpertalk.com/shop/oem.php?partcategory=368054&manufacturer=8&category=5&year=1999&model=6989

426 - https://www.thumpertalk.com/shop/oem.php?partcategory=366185&manufacturer=8&category=5&year=2000&model=6943

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