I have a 2001 KX125 i just bought an rebuilt the topend on it .it starts first kick an i have it on a motorcycle lift.in neutral wheels spin minimal,i put in hear it starts rolling like it should but as soon as i put the back tire on the ground the wheels stops rolling as if it were in neutral. Please help.the clutch wasnt engaging becuase of the thiness of the shim so i put a thicker shim so the ballbeairng could push the basket off the plates when the clutch was engaged fully.im pulling my hairs trying ro find this.i ride a 450yfz in the meantime but i would really like to take the kx out for a ride