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2. Connect the tachometer to the spark plug
lead, and then set the idle to the specified
idling speed by adjusting the throttle stop
screw. Turn the screw in direction a to
increase the engine speed, and in direction
b to decrease the engine speed.
EBU00303
Valve clearance adjustment
The correct valve clearance changes with use,
resulting in improper fuel/air supply or engine
noise. To prevent this, the valve clearance must
be adjusted regularly. This adjustment however,
should be left to a professional Yamaha service
technician.
8-16
Specified idle speed:
1,650 – 1,750 r/min
a
b
q
1. Throttle stop screw
5VJ-9-10-3 3/26/02 7:31 PM Page 8-17