Valve Job

I have a 2001 YZF426 which has the titanium valves. I just finished doing a complete engine rebuild with the added auto decompression Hot Cams which I am pumped about. My question is, I am putting new valves and springs in it and dont have the money to put all new titanium valves in it so I was going to put 2000 model Stainless valves and 2000 model springs in it. Will the different springs/valves wear different on the lobes of my new cams since it is for the 2001 426? Maybe a stupid question but just wondering. Thank you.

your cams never touch the valve itself,it runs on the shim then the bucket so your cams are running on the same metal as if you had titanium valves.

Edited by etuke

Thank you so much for your help. I love this site. Any reasons why I should not use titanium valves other than longevity? The bike is not raced, just a

weekend rider on trail and sometime track.

price is a good reason.

Thank you for your help etuke. It is much appreciated.

The cams won't touch the valves, but in order to use the stainless valves from an '00 model (and I would, if it were mine), you need the heavier valve springs from the '00 to go with them. The heavier springs will put more pressure on the cam lobes. It' OK, though since the engine was originally designed for that. As long as none of the lifters are worn significantly on top, you should be OK.

Thank you for your help greyracer. Is it necessary to replace the valve guides everytime I replace the valves or is it only if they are in bad shape? Thanks.

It's almost never necessary to replace the guides on bucket tappet engines because there's never any side loading of the stem. They should always be checked, of course, but they will rarely need new ones.

Awesome. Thank you for your help greyracer. I can see you are well respected on the forum so I feel confident I am getting good information. I really appreciate it.

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

  • Similar Content

    • By High On Octane
      Got a break in the weather over the weekend, and was finally able to get out on a track for the first time since October.  I know I suck compared to a lot of guys (and kids for that matter), but I always have a blast twisting a grip and roosting some dirt!  Here's a raw uncut lap around the MX track at IMI Motorsports Complex in Dacono, CO.  Was a fun day despite some wind.  Also, there was a drift car club having a meet on the road course.  So, got to check out some drift car action while we were taking a break.
    • By PFOS58
      Lightly used Clarke Gas Tank (model #11614) for a 2010-13 YZ450F.  Includes cap.  For fuel injected YZ450F, so needs to have fuel pump transferred over.  Rest of stock tank hardware fits perfectly.  2.8 gallon capacity, so great for desert, hare scrambles, or WORCS.  Retails for $240.
      E-mail me with any questions or offers at
      Buyer pays shipping from 84726.
    • By faizakhtar125
      Like this comment if you have a YZ. I want to see how many people have YZ's, especially YZ125's
    • By PFOS58
      ProMoto Billet KickIt kickstand for 2010-13 YZ450F.  Model 5006.  Used, but in good shape.  Buyer pays shipping from 84726.  Will take PayPal.
    • By PFOS58
      Used FMF Factory 4.1 Full Exhaust System. Includes slip-on muffler and two piece header.  Includes approved spark arrestor.  No dings or dents.  Fits YZ450F from 2010 to 2013.  You pay shipping from 84726.