A buddy of mine has a 03 KX250 engine complete, fully rebuilt and looking for something to stick it in to.
It just so happens that I have a 2007 KX450F frame.
So we stuck the engine in it to see what would happen.
And of course the frame yoke is too low to let the exhaust pipe out
But then we knew that.
Next thing I know my buddy pulled a 01 cr250 frame from storage and drops the engine in...
PS... This engine is a 95 KX250 that was handy for fitment purposes.
Kawaonda or a Honasaki