yz400f engine rebuild

1 reply to this topic
  • Cavi

Posted March 31, 2009 - 03:11 PM


okay, unfortunitly I was right, the 400 I bought does need a full engine, the previous owner did indeed put a new piston and rings but he did not fix the cylinder which is missing chunks of crome plating. Anyway, is the 426 jug different in size?
Replate or get new cylinder, the new one is about 100 dollars more. Ideas?
Any must knows or upgrades on the rebuild?

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

Posted March 31, 2009 - 03:19 PM


If you want to get off as cheaply as possible, then go the replate route.

If you're going to go with a new cylinder, and the crank needs work, you can make a 426 out of it by using the connecting rod, wrist pin, piston, and cylinder from the bigger bike.

Related Content


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.