Review on Athena P400210100001 100Mm 490Cc Cylinder by Dink Rivas

I am the second owner of an '03 CRF450R with this kit. I got it with 87 hours off road and the original piston still looked good. I then installed a CP 13.5:1 piston and 3rd stage cam. I now have 130 hours on it which translates to 43 hours of use in this really powerful state. This setup will easily pull the new (2022) 450 in the dunes, on climbs, anywhere power is important, and it is everywhere.