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 operationGeneral description
Combination meter system description
This combination meter mainly consists of a stepping motor, lcd (liquid
crystal display) and leds (light emitting
diode).
The tachometer pointer is driven by the stepping motor.
The lcds indicate followings:
speed, odo / trip 1 / trip 2 / fuel reserve ...
Conrod and crankshaft inspection
Refer to “engine bottom side disassembly” (page 1d-
49).
Refer to “engine bottom side assembly” .
Conrod small end I.D.
Measure the conrod small end inside diameter using the
small bore gauge.
If the conrod small end inside diameter exceeds the
service limit, replace the conrod.
Special ...
Special tools and equipment
Recommended service material
Note
required service material is also described in the following.
“Transmission components” “gearshift lever construction”
“gearshift shaft / gearshift cam plate components” “gearshift
shaft construction”
Special to ...