Speed B21 Engine side view

Speed R2103 1/8 On-Road Engine

The next generation of performance

The next generation of on-road performance has arrived with the Speed R2103 from O.S.! Capable of a wider range of torque than the R2102, the Speed R2103 dominates even on high-grip surfaces. Superior fuel consumption ensures you get the most mileage from every fill-up. Factory-applied two-color graphics add signature style to this sleek-looking power plant.

Speed R2103

Speed R2103 with Muffler

  • Specifications
  • Parts Listing

Stock Numbers: OSMG2020 (w/o Muffler), OSMG2021 (w/Muffler)
Displacement: 0.213 cu in (3.49 cc)
Bore: 0.633 in (16.08 mm)
Stroke: 0.677 in (17.2 mm)
RPM Range: 4,000-45,000
Output: 2.76 hp @ 33,000 rpm
Weight: 11.99 oz (340 g)
Both Include: Exhaust seal ring, tapered collet and three carb dust seal caps
OSMG2021 Includes: T-2080SC exhaust pipe
OSMG2020 Requires: tuned pipe set
Both require: Glow fuel with 10-30% nitromethane content (20% recommended for break-in)

Product Manual