I've seen pictures of 300ex's with 400ex's motors in them (July edition of dirtwheels, Readers Rides P.125). I think this would be the best of both worlds because the 300 is great in the trails do to it's small size but lacks power in motocross. I want to know if anyone has this done or knows of anyone with it done because I want to do it to my 300. I want to know how the frame and suspension handle the bigger motor.

PoWeR

95 300EX

note from atvbbs: with over 10,000 users duplicate posts are not possible. You other post with the same text & different title has been deleted.

 

the page is 123, and the motor's are about the same weight.