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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.
1. Throttle stop screw
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.
EBU00304
Cam chain adjustment
The cam chain becomes loose with use, result-
ing in improper valve timing and engine noise.
To prevent this, the cam chain tensioner must
be adjusted regularly. This adjustment should be
left to a Yamaha service technician.
EBU01218
Front and rear brake shoe inspection
A wear indicator is provided on each brake. The
indicators allows checking of brake shoe wear
without disassembling the brake. Apply the brake
and check the position of the indicator. If the indi-
cator reaches the wear limit line or mark, ask a
Yamaha dealer to replace the shoes as a set.
q
a
b
Specified idle speed:
1,750–1,850 r/min
5TH-9-15-3 6/15/05 2:56 PM Page 8-18