2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 28Get this manual

2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 28

CARBURETOR SYNCHRONIZATION INSP ADJ CARBURETOR SYNCHRONIZATION NOTE: Prior to synchronizing the carburetors, the valve clearance
90793-80009, YU-8036-B 3Start the engine and let it warm up for several minutes4Inspect: Engine idle speed Out of specificationAdjustRefer
to "ENGINE IDLE SPEED ADJUSTMENT"Engine idle speed: 1,350 100 rmin (1,250 1,450 rmin) 5Adjust: Carburetor synchronization