1KT Yamaha TZR250 straight cut primary gear set with kick start (TDR/R1-Z)

Brand new, straight cut primary gear set for the Yamaha TZR250, TDR250, R1-Z parallel twin. Aimed at the dedicated racer / track day goer and performance orientated road rider, a straigh cut primary drive improves performance by removing the power loss associated with the 'axial load' of the standard helical gear set. This system retains the kick start, with a beautifully engineered, one piece, integrated primary gear and kickstart gear.