i have a arens 250r with all the gear, and im thinking of getting rid of my 310 powervalve and putting in a yfz450 motor to maintain competitive, but my local parts supplier is warning me against it and that i should just buy a 450r new. i have too much invested in the 250r and i love the way it handles.
do you guys have experience in changing the frame and problems encountered? what about fabricating a pipe to fit? i would of thought that a 250r with this motor would be the best of both worlds?
i thought putting a yamaha motor is easy, but any help you can give me to make up my mind is appreciated.