Ofna .21 engine has an oversized flow-through purple anodized cylinder head. ABC construction (Aluminum piston with a Chromed Brass cylinder). Rear exhaust. Ball bearing supported crankshaft. Slide Valve carburetor for greater response at the beginning and end of the power band. This works well for on-road and racing applications for fast take-offs and high speed. Needle valve adjusted by a screwdriver. Pilot shaft.

This kit includes one .21 Ofna Hyper engine w/slide valve carburetor and pull-start. One brass collet (these hold flywheel in place). One header with seal, clamp and spring. One running and parts information sheets. One Hyper .21 decal sheet

Fuel with 5%-30% Nitromethane (20% is recommended) and a lubricant content of 16% or more. Muffler or tuned pipe w/manifold. Glow plug: long without idle bar, can use O.S. Max #8.