O.S. Speed R2101 .21 on-road engine

O.S. Engine introduce the O.S. Speed R2101 .21 on-road engine. Building on the winning heritage of the 21ZX-R the newly developed engine is of a 7+3 port design, and comes with a redesigned liner and piston for improved fuel economy, a new crankshaft and a new cooling head. A pre-production version of the engine was used by Mugen’s Takaaki Shimo to win the Pre-Worlds race back in May with the actual production engine will be used by the O.S. team at the upcoming Worlds next month.

Specifications:
– Displacement: 3.49cc
– Bore: 16.08mm
– Stroke: 17.2mm
– RPM range: 4,000 – 45,000
– Power output: 2.8HP/33,000 RPM
– Weight: 340g

Source: O.S. Engine [os-engines.co.jp]