This RMZ450 cam has less than 20 hours on it : http://www.ericgorr.com/images/drn/rmz450_exh_lobe_1.jpg http://www.ericgorr.com/images/drn/rmz450_exh_lobe_1b.jpg http://www.ericgorr.com/images/drn/rmz450_exh_lobe_2a.jpg http://www.ericgorr.com/images/drn/rmz450_exh_lobe_closing%20side.jpg The RMZ's intake cam looked almost exactly the same, but oddly enough the intake valves were in fairly decent shape. The rings and piston were completely shagged. It smoked like a two-stroke when it came in. This CRF 450 cam has 2 full seasons : http://www.ericgorr.com/images/drn/HondaCRF450_03_2_seasons%20on%20cam.jpg Forensic work on engines sure is interesting. All pictures are of the closing ramp side of the cams.