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R21 1/8 On-Road Club Racer Engine
Item No.
OSMG2032
R21 1/8 On-Road Club Racer Engine
Item No.
OSMG2032
$349.99
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$549.99
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Manuals & SupportPremium power, entry-level ease.
Club racers rejoice! The R21 engine 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. Best of all, they can be upgraded with O.S. Speed parts when you want to step up to Spec-class competition. High performance. Low price. That’s what you can expect from the R21, only from O.S.
- The perfect power plant for rookies and club racers!
- Upgradable, newly developed crankshaft and piston/liner lets you transform the R21 into a Spec-class performer.
- RP7 Turbo glow plug.
- 8.5 mm carb reducer.
- Speed flywheel collet.
- Exhaust seal ring.
- Dust cap set.
Product Specifications
Specs
| Displacement | 0.213 cu in (3.49 cc) |
| Power Type | Glow |
| Crankshaft Threads | UNF1/4-28 |
| Cylinders | Single |
| HP | 2.75 PS 2.71 HP @ 32,000 rpm |
| Plug Type | Turbo RP7 glow plug |
| Product Height | 3.6 in (91.2mm) from backplate to front bearing |
| Product Length | 2.5" (64.5 mm) |
| Product Width | 1.8 in (45 mm) at mounting tabs |
| Recommended Fuel | 10-30% nitro content, 25% recommended for break-in |
| RPM Range | 4,000 - 44,000 rpm |
| Stroke | 0.67 in (17.2 mm) |
| Total Weight | 12.35 oz (350 g) |
| Bore | 0.64 in (16.3 mm) |
| Carb Type | 21M2 slide valve w/8.5mm restrictor |