I know if honduh would have put that Cr 500 motor on a Quad , That Would have Been Crazy Fast , I Still Don't See Why Allot of people didnt do that to there 250r or 250x ? , But Back To The 250r motors , I ran across one the other day online and Was On its Original piston , And still running , But guy wanted 2000 cash it was almost all original , If i had it to spare i would have bought it , but i Just bought a Expedition