The Kawasaki Ninja 650, also called ER-6f or EХ-6, is a motorcycle in the Ninja series from the Japanese manufacturer Kawasaki sold since 2006. The 2012 model drops the R suffix from its name. It is a middleweight, parallel-twin engine motorcycle, designed for normal use on paved roads

This bike is used in several race classes around the world, from AMA dirt tracking and MotoAmerica here in the USA to the fastest roads in Europe and the Isle of man this is what so many racers and teams call the lightweight bike of choice.

Spears Racing Kawasaki Ninja 650 engine parts have been involved in the Irish racing series for several year winning numerous close coarse championships, setting many track records and the Isle Of Man 4 times on a Kawasaki 650cc.

Spears Racing designed a plus 2mm over kit for the Kawasaki Ninja in 2019 to mirror the “new Rules” in the USA for MotoAmerica Roadracing. Soon the word of the over bore piston(s)/kit was out and since several of the race teams in Europe have won several races and championships.

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