Ofna oversized flow-through black anodized cylinder head. ABC construction (Aluminum piston with a chromed brass cylinder). Rear exhaust. Ball bearing-supported crankshaft. Slide valve rotatable carburetor. Needle valve adjusted by a screwdriver. Pilot shaft. This kit includes one .21 Ofna Hyper engine w/slide valve carburetor. One brass collet (these hold flywheel in place). One header with seal, clamp and spring. One running and parts information sheets and one Hyper .21 decal sheet.
Fuel with 5%-30% Nitromethane (20% is recommended) and a lubricant content of 18% or more. Muffler. Glow plug (long plug without idle bar)
very good motor runs great lots of power cant hurt it period