2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 72Get this manual
THROTTLE LEVER FREE PLAY ADJUSTMENT SPEED LIMITER ADJUSTMENT Tighten
INSP ADJ
the locknut 5Push in the adjuster cover 4
WARNING
After adjusting the free play, turn the handlebar to the right and left to make sure that the engine idling speed does not increase