400 into a 250f

1 reply to this topic
  • zombiekilla

Posted November 12, 2009 - 01:01 PM


I have a 99 YZ400F that I was planning on doing a full engine rebuild on. A friend of a friend has a pristine '07 YZ250F chasis that he would sell me for a steal. It is totally complete minus engine. I got to thinking would the 400 motor fit and would it be a worthwhile swap. My 400 isn't my primary bike anymore so I could take my time. Has anyone ever done something like this?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • rmx250rider

Posted November 12, 2009 - 10:35 PM


you would most likly have to cut and have someone reweld the mounts on

Related Content


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

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews

Michigan Motocross Tires by 288yz450

Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply

First Hare scramble tips by dhend8

Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • Hot  33 replies

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 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.