This is a factory OEM stock engine motor cylinder head for a Yamaha YFZ450. THIS HAS BEEN PORTED AND POLISHED. CAMS ARE HOT CAMS , #22 and #23. This was totally gone through, cleaned in a part tank, all valves were replaced with brand new ones. Everything inspected and replaced as necessary. Valves were all cut and matched, and then shimmed to proper specs. Valve seats, cam journals , and cams have all been checked and adjusted to proper specs; cam shim clearance is set properly. This is 100% bolt on ready. Includes everything seen in the photos including: factory head assembly, camshaft, cam, camshafts, valves, seats, cam journals are…