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.
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