
8-5
chamber hot spots and thread damage. Always use a
spark plug with the proper reach.
Spark plug reach
1
:
19.0 mm (0.75 in)
Before installing any spark plug, measure the electrode
gap with a wire thickness gauge and adjust to specification.
Spark plug gap
2
:
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
When installing the plug, always clean the gasket surface.
Wipe off any grime from the threads and torque the spark
plug properly.
Spark plug torque: 20 Nm (2.0 m·kg, 14 ft·lb)
834-001
ESU00146
ENGINE IDLE SPEED ADJUSTMENT
CAUTION:
•••••
Be sure this adjustment is serviced by a Yamaha
dealer.
•••••
Be sure the throttle lever moves smoothly.
1. Start the engine.
NOTE:
Refer to STARTING THE ENGINE.
2. Turn the throttle stop screw
1
in or out to adjust the
engine idle speed.
Standard engine idle speed:
1200
±
100 r/min
804-018
Summary of Contents for VK540EG
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