I bought a 2001 gently used KDX220 this winter. Nothing on the bike has been changed from stock. I have modified the air box and am working on the jetting at the moment. I've seen some threads here that tell me the 220's piston is weak and should be replaced. Since the bike I have is two years old and I would say that the top end has not been touched, should I look at replacing the piston ASAP, or since nothing has gone wrong with this bike in the last two years would it be safe to wait till this winter to tear it down.
Any advice from the experienced would be appreciated.
Any advice from the experienced would be appreciated.