2-14CARBURETOR SYNCHRONIZATION INSPADJNOTE:CARBURETOR SYNCHRONIZATIONPrior to synchronizing the carburetors, the valveclearance and the engine idling speed shouldbe properly adjusted and the ignition timingshould be checked.1. Remove: Vacuum cap2. Install: Carburetor synchronizer 1 Engine tachometer (near the spark plug)Carburetor synchronizer90890-03094, YU-8030Engine tachometer90793-80009, YU-8036-B3. Start the engine and let it warm up for severalminutes.4. Inspect: Engine idle speedOut of specification Adjust.Refer to “ENGINE IDLE SPEED ADJUST-MENT”.Engine idle speed:1,350 ± 100 r/min(1,250 1,450 r/min)5. Adjust: Carburetor synchronizationAdjustment steps: Synchronize carburetor #2 to carburetor #3 byturning the synchronizing screw 1 in eitherdirection until both gauges read the same.
