O.S. MAX ENGINE R21 On-Road

An internal combustion engine from Japanese company O.S. Max for model cars.

Most of the parts have been re-engineered based on the OSSPEED R2102, which is a top-of-the-line model, to achieve both the ease of use and high performance required of a basic 21 Racing engine.

Technical specifications:

• capacity: 3.49 cm3
• piston diameter: 16.08 mm
• piston stroke: 17.20 mm
• power: 2.71 hp at 32,000 rpm
• rPM range: 3 000 - 41 500
• weight: 350 g

Set includes:

• motor
• rP7 glow plug

*Follow the instruction manual included with the product.