Performance Kit: "108cc Big Bore Kit" V1 RACE HEAD, 51mm Stroker Crank, 26mm Mikuni CARB KIT For 1981 and Up HONDA ATC70'S. Lightweight aluminum cylinder with steel sleeve - Cast in mounts on cylinder for aftermarket skid plates - Oversized cooling fins on cylinder for efficient heat dissipation - 52mm high compression piston with rings, pin, & clips - Head gasket kit and clutch cover gasket. High performance race camshaft (for the Race Head only). V1 Race Head - 26mm Mikuni carb assembly. Includes: 26mm carb, intake, heatstop, gaskets, mounting hardware/wrench, long adjustable throttle cable, and a angled dual layer foam air filter.