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O.S. Engines

O.S. Engine® 21XR-B(P)


Precision power for club competition!

O.S. Engine® 21XR-B(P)
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Take the guesswork out of kit building with the 21XR-B(P). If you are racing, building or upgrading an 1/8 scale buggy, there is no better engine on the market. All O.S. Engines are engineered to deliver maximum performance, quality and value and the 21XR-B(P) is no exception. With its easy-tune 22B carburetor and proven O.S. cooling technology, the 21XR-B(P) is the engine you want when things get hot.
Displacement: 0.213 cu in (3.49 cc), Bore: 0.641 in (16.27 mm), Stroke: 0.661 in (16.8 mm), Practical RPM Range: 4,000-40,000, Output: 2.45 ps @ 33,000 rpm, Weight: 13.05 oz (370 g), Requirements: Glow fuel, installation, glow plugs building and field equipment

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