Kitaco's flagship 125cc kit for the XR100R and CRF100F. Full double overhead camshaft cylinder head with dual 21mm intake valves and dual 18mm exhaust valves. 57mm bore all aluminum cylinder with forged DOHC piston, 48.96mm stroke crankshaft, and 11.5:1 compression. Piston and buckets are WPC + MOS2 treated for superior strength and ultimate reduction in friction. Also fits NSF100 models, but the enlarged head will interfere with frame rails and require mods to fit.