kelsorat said:Rocket Science Racing used to build them.
rob129 said:I saw a KX500 engine stuffed into a KX80 rolling chassis on evilbay a while ago.
Now there's a novel idea!mx547 said:tx246 had a kx500 engine in a ninja.
Zuk Rider said:I have heard of a few guys putting CR500 engines in Rolling CR250 frames. They just had to move the engine mounts a bit and in it went. I think that would be pretty neat to have that kind of power in an MX bike.