R21 1/8 On-Road Club Racer Engine Product Specs
- Bore0.64 in (16.3 mm)
- Crankshaft ThreadsUNF1/4-28
- CylindersSingle
- Displacement0.213 cu in (3.49 cc)
- Plug TypeTurbo RP7 glow plug
- Power TypeGlow
- Product Height3.6 in (91.2mm) from backplate to front bearing
- Product Length2.5" (64.5 mm)
- Product Width1.8 in (45 mm) at mounting tabs
- RPM Range4,000 - 44,000 rpm
- Stroke0.67 in (17.2 mm)
- Total Weight12.35 oz (350 g)