motor swap

1 reply to this topic
  • robg

Posted August 03, 2006 - 05:21 AM


I'm puttin a 2001 yz426 motor into my 2000 wr400 frame, Just wondering if there is any thing that I should look out for. like will the carb off the 400 be fine for the 426, CDI is it ok? or should I look for 426 stuff


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

Posted July 21, 2007 - 06:51 AM


I just did the same thing. 2001 YZ426 in my 99 WR400. Overall it going pretty well, but when I use my 400 carb (with a 426 Dyno Jet kit) on the motor it runs like crap at anything >3/4 throttle. I know it's something to do with the carb, because I also have a 2002 YZ426 SM and I swapped carbs. The WR400 went like a raped ape with the new motor/carb. Did you run into anything like this?


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.