2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 74Get this manual
ADJUSTING THE SPEED LIMITER a 2
1Measure: Speed limiter length Out of specificationAdjustSpeed limiter length Less than 12 mm (0.47 in) 2Adjust: speed limiter length aLoosen the locknut bTurn the adjusting screw in or out until the specified speed limiter length is obtainedDirection Direction Speed limiter length is decreasedSpeed limiter length is increased