New exhaust valve linkage system provides more precise, linear opening of the exhaust valves for improved power delivery and throttle response at all rpms.
Reshaped exhaust valves with new oval cross section for better exhaust port seal and improved low-to-mid rpm power output.
improved airbox design features a new front cover to block engine heat and is fed by frame cover-mounted cool air ducts fro improved throttle response
More precise shifting transmission features a new shift pawl pin with reduced side play, a press-fit gearshift stopper pin and a more durable shiftcam stopper sring.
Improved engine cooling with 10% larger radiator.
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