O.S. Speed R2104 Race Engine (L-OS1C600)

O.S. Speed R2104 Race Engine (L-OS1C600)

This 9-port power plant was developed with this year's IFMAR 1/8th Nitro On-Road World Championship in mind. It features an updated piston and liner design that increases overall torque, while the DLC coated crankshaft offers improve transition from low to high rpms. 

The engine also sports a new combustion camber insert with a silicone O-ring, adapted from O.S. Engine’s off-road engines, preventing dust and dirt contamination. The R2104 is rounded off with a new design cooling head in a 2-tone black and red finish with white laser-engraved graphics.

• The cylinder liner uses a new 9 port design
• The cylinder head uses a two-colour anodising 
• Increased fin pitch achieves both cooling performance and weight balance
• Equipped with 21M2 (B) slide carburetor, 

Specification

• Displacement: 3.49cc
• Bore: 16.08mm
• Stroke: 17.20
• Power Output: 2.76/35,000 (BHP/rpm)
• Practical RPM: 4,000 - 45.000rpm