The exhaust control system (excs) consists of the exhaust control valve (excv), exhaust control valve actuator (excva) and exhaust control valve cables (excv cables).
Excv is installed in the exhaust pipe. Excva is mounted inside of the right frame. The excv is operated by the excva via the cables. This system is designed to improve the engine torque at low engine rpm.

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Exhaust control system operationStarter torque limiter inspection
Removal
Remove the clutch cover. Refer to “clutch removal” in section 5c .
Remove the washers (1), starter idle gear no. 1 (2)
And no. 2 (3).
Remove the starter idle gear no. 2 Bearing (4), shaft
(5) and washer (6).
Hold the starter clutch with the special tool an ...
Rear brake light switch inspection and adjustment
Check the rear brake light switch so that the brake light
will come on just before pressure is felt when the brake
pedal is depressed. If the brake light switch adjustment
is necessary, turn the adjuster nut (1) in or out while
holding the brake pedal.
Brake fluid level check
Refer to “bra ...
Spark plug inspection and cleaning
Inspect spark plug
every 6 000 km (4 000 miles, 12 months)
Heat range
Remove the spark plugs. Refer to “ignition coil and spark plug removal
and installation” in section 1h .
Check spark plug heat range by observing electrode
color. If the electrode of the spark plug is wet
appe ...