Yes this is what they recomend. Rebuild only means new rings and, piston if needed. But they are expecting it to be raced were they are normally driven to the max and the fact that racers want every last bit of HP possible. when doing almost any trail riding you can put more miles on it. I would only replace rings when your commpresion drops below 110 Psi. I think it is suppose to have 120 Psi. And yes keep the timing at zero unless you are running race fuel. the motor is rated at 98 HP