O.S. Max-R21 3.5cc club-level nitro on-road engine

Available now from O.S. Engines is the Max-R21 3.5cc nitro on-road engine. The power plant is based on the championship heritage of the R2102 engine and delivers a perfect blend of power and value for 1/8th 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 drivers realise their full winning potential.

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
– 8.5mm carb reducer
– Speed flywheel collet
– Exhaust seal ring
– Dust cap set

Specifications:
– Displacement: 3.49cc
– Bore: 16.08mm
– Stroke: 17.20mm
– Practical RPM: 4,000-44,000
– Power output: 2.71 hp @ 32,000rpm
– Weight: 350g
– Includes: RP7 Turbo glow plug, exhaust seal ring, 8.5 mm carb reducer, dust cap set

Source: O.S. Engines [osengines.com]