Quote:
Originally posted by enduro400rider
all 250x and 300ex parts are compatible, they have the same motor just with a little longer stroke, the heads are the same i beleive so you could use a 250x jug
NOT trying to flame, but want to set things straight for future readers, as I have found myself reading post years old. Not all parts are compatible. The top end should be completely the same besides the piston and cam, though both can be interchanged. Also the bottom end has some differences and can't all be interchanged. The cranks, cases and some misc. parts can't be switched.