YFZ426 question

3 replies to this topic
  • Punisher660

Posted April 17, 2006 - 01:40 PM


I read through the sticky but didn't really see an answer to my question.

All of us WR guys are putting YZ cams in to wake the bike up, but does it work in reverse?

Looking at getting a YZF426 for my son, its a little too much bike right now, but he is a good rider and can easily grow into it. I have a 04 WR450 cam in the garage....will it fit the YZF 426? If so, will it mellow it down and will the auto decompression work?

If not, what part do I need to do this?
If I can't mellow it down for him, what do I need to get auto decompression working?

  • kizzle426

Posted April 17, 2006 - 02:03 PM


I'm not sure about the WR cam, but I would just buy a flywheel weight and put some nice restrictive exhaust on there. It'll take all the hit off the bottom that you can gradually open up for him. Just a thought.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted April 17, 2006 - 03:54 PM


Yes, that should work fine. Use the timing procedure for the cam swap exactly as written for the YZ426/YZ450 swap (time the intake cam and count pins between the 12:00 o'clock marks on the two cams). You should end up with the WR450 cam timing and auto decompression. The difference between the WR and YZF is already built into the cam, so don't second guess or alter the instructions, just use the WR cam in place of the YZ unit.

If I had the cam already available, I would try it, if I were in your position. The worst that could happen is that you won't like it, and that's reversible. Let us know when you get it done.

  • Punisher660

Posted April 18, 2006 - 03:21 PM


great, thanks guys :thumbsup:

Related Content


Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.