R21 1/8 On-Road Club Racing Engine

R21 1/8 On-Road Club Racing Engine

Premium power, entry-level ease.

Club racers rejoice! The R21 is based on the Championship heritage of the R2102 engine and delivers an unbeatable blend of power and value for 1/8 on-road racing. Its crankshaft and piston/liner are designed with premium performance and easy maintenance in mind, which makes it an ideal choice for beginners. This engine is upgradeable with high-performance O.S. Speed parts, letting you realize your full winning potential. High performance. Low price. That's what you can expect from the R21, only from O.S.



  • Specifications
  • Parts Listing

Stock Number: OSMG2032
Displacement: 0.213 cu in (3.49 cc)
Bore: 0.633 in (16.08 mm)
Stroke: 0.677 in (17.20 mm)
Practical RPM: 4,000-44,000
Power Output: 2.71 hp @ 32,000 rpm
Weight: 12.35 oz (350 g)
Includes: RP7 Turbo glow plug, exhaust seal ring, 8.5 mm carb reducer, dust cap set
Requires: Glow fuel, glow igniter, fuel filter, fuel bottle, starter and T-2080SC Tuned Pipe Set (OSMG2983)