OS MAX-R21 1/8 On-Road

O.S.Engine Nitro Motor R21

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.

Features:

• The perfect power plant for rookies and club racers.
• Newly developed crankshaft and piston/liner with the capability to upgrade later to a Spec-class performer.
• RP7 Turbo glow plug.
• 8.5 mm carb reducer.
• Speed flywheel collet.
• Exhaust seal ring.
• Dust cap set.

• Displacement: 3.49cc
• Bore: 16.08mm
• Stroke: 17.20mm
• Port: 5
• Power Output: 2.75 PS  @ 33,000 RPM
• Practical RPM Range: 3.000~41.500 RPM
• Weight: 350g
• Includes: RP7 Turbo glow plug, exhaust seal ring, 8.5 mm carb reducer, dust cap set