Kitaco's new for 2021 Type 3 124cc DOHC bore and stroke kit is the new king for CRF50 XR50 CRF70 XR70 owners. New combustion chamber design, intake/exhaust port shaping, stronger valves, and cam cover with baffled vent design brings this kit up to full current spec. Dual 21.5mm intake valves and dual 18mm exhaust valves with 3.5mm stems. Oil cooler ports molded right into the head at the camshaft ends. Oval intake and exhaust ports for maximum efficiency. Kitaco spared nothing with this kit and includes their proven H-Rod 54mm crankshaft, all aluminum 54mm ceramic coated cylinder, with chromed (Nikasil type) cylinder wall. This is a complete kit and includes Denso Iridium plug, SD ultra strong cam chain, and forged aluminum 11.6:1 WPC+MOS2 treated piston, all hardware and gaskets to complete.

• 12.2:1 piston available separate
• 13.0:1 DLC 2 ring piston available separate
• case boring is required
• retains stock exhaust port location and angle
• requires Kitaco oval intake manifold available for VM26 and PWK28