2007 Yamaha Apex Factory Service Manual, Page 31Get this manual

2007 Yamaha Apex Factory Service Manual, Page 31

CARBURETOR SYNCHRONIZATION INSP ADJ NOTE: After each step, rev the engine two or three times, each time for less than second,
in either direction until both gauges read the sameVacuum pressure at engine idling speed 35 kPa (0.35 kgcm2, 4.98 psi) NOTE:
The difference in vacuum pressure between two carburetors should not exceed 1.33 kPa (0.01 kgcm2, 0.19 psi)6Measure: Engine
idle speed Out of specificationAdjust7Adjust: Throttle cable free play Refer to "THROTTLE CABLE FREE PLAY ADJUSTMENT" http:ReadManm