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[[Honda|Honda's]] 'New Road' (NR) [[V4|V-four]] [[motorcycle]] engine series started in 1979 with a [[NR500|500cc]] [[Grand Prix motorcycle racing|Grand Prix]] racer that used oval pistons. The oval [[piston]] allowed for eight [[4-stroke cycle engine valves|valves]] per [[Cylinder (engine)|cylinder]] which generated more power due to the increased air / fuel mixture throughput and compression. | |||
[[Honda|Honda's]] 'New Road' (NR) [[V4|V-four]] [[motorcycle]] engine series started in 1979 with a [[NR500|500cc]] [[Grand Prix motorcycle racing|Grand Prix]] racer that used oval pistons. The oval [[piston]] allowed for eight [[4-stroke cycle engine valves|valves]] per [[Cylinder (engine)|cylinder]] which generated more power due to the increased air / fuel mixture throughput and compression. | |||
[[Category:Honda motorcycles|NR]] | [[Category:Honda motorcycles|NR]] | ||
{{motorcycle-stub}} | {{motorcycle-stub}} |