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R21 1/8 On-Road Club Racer Engine R21 1/8 On-Road Club Racer Engine R21 1/8 On-Road Club Racer Engine R21 1/8 On-Road Club Racer Engine R21 1/8 On-Road Club Racer Engine R21 1/8 On-Road Club Racer Engine
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Bore: 0.64 in (16.3 mm)
Carb Type: 21M2 slide valve w/8.5mm restrictor
Crankshaft Threads: UNF1/4-28
Cylinders: Single
Displacement: 0.213 cu in (3.49 cc)
HP: 2.75 PS 2.71 HP @ 32,000 rpm
Height: 3.6 in (91.2mm) from backplate to front bearing
Length: 2.5" (64.5 mm)
Plug Type: Turbo RP7 Glow Plug
RPM Range: 4,000 - 44,000 rpm
Recommended Fuel: 10-30% nitro content, 25% recommended for break-in
Stroke: 0.67 in (17.2 mm)
Total Weight: 12.35 oz (350 g)
Type: 2-stroke, glow powered 1/8 scale .21 on-road club racer engine
Width: 1.8 in (45 mm) at mounting tabs

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