Ofna Hyper .21 with Pull Start Engine OFN53211
OFN53211 Ofna Hyper .21 w/Pull Start

Ofna Hyper .21 with Pull Start Engine OFN53211

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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)

Displacement: 3.49cc  (.21 cubic inches)
Bore: 16.26mm
Stroke: 16.8mm
Weight: 350g
Length: 85mm (3.355") from front of front bearing to back of pull start.
Width: 31mm ( 1.21") the width neglecting the mounting flanges
Width: 36mm (1.43") distance across crankcase measured between the centers
Height: 113mm (4.428")

Review Summary


5 Stars the hyper 21 turbo

cory from IN wrote (April 23, 2010):

very good motor runs great lots of power cant hurt it period