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,
• Supplied complete with T-2080SC muffler and MR02 manifold

Specifications
Capacity	3.49cc
Bore	16.08mm
Stroke	17.20
Power Output	2.76/35,000 (BHP/rpm)
Practical RPM	4,000 – 45.000rpm

Spec

• Brand: OS Engines
• Part No: L-OS1C601
• Barcode: 4531028025417
• Displacement: 3.5cc (0.21ci)
• Starter: Flywheel Start