I am rebuilding a 1989 XR600r, found a bad rocker and Im not going to take any chances and reolace the cam. What cam do I put in? Happy with stock power but woudnt mind a more aggressive cam if there is no tradeoff in reliability (I know there is always a tradeoff, but something mild the tradeoff is pretty minimal). HRC, WB, Hot Cams? With the motor apart, anything to replace on the lower end? Finally, if I feel that I am in over my head, who do I ship the heads to? Who does good work? I want it back to stock specs, nothing wild. I think the cam is all I am going to do unless the piston is shot or the lower bearings are toast.