2003 kx 65 dirt bike mx

2003 kx 65. new lower unit -crank, eal and bearings all new. replaced piston and rings. the cylinder does have a score and for racing ortop performance it should be fixed but it doesn't affect normal riding. Invested 1k on lower unit work so this is a great deal for someone, y kid has just grown to the next class. I was thinking he would use this for another year or twoso we rebuilt the motor.