The excs is operated by the signal supplied from the ecm. The open/close operation of the excv is performed by the excva which is controlled by the ecm by changing the current direction of the actuator motor. The position sensor (incorporated in the excva) detects the excva movement by measuring the voltage and then the ecm determines the excv opening angle based on the engine rpm and gear positions. Every time the ignition switch is turned on, the excva automatically drives the excv and detects full close/open position voltages and sets the excv to middle position.
Full close

Full open

Exhaust control system descriptionSprocket mounting drum dust seal / bearing removal and installation
Removal
Remove the rear wheel assembly. Refer to “rear wheel assembly removal
and installation” in section 2d .
Remove the rear sprocket mounting drum assembly
(1). Refer to “rear sprocket / rear sprocket
mounting drum removal and installation” (page 3a-
3).
Remove the ...
Front wheel assembly removal and installation
Removal
Remove the brake calipers, left and right.
Caution
do not operate the brake lever with the
caliper removed.
Loosen two axle pinch bolts (1) on the right front fork
leg.
Remove the front axle bolt (2).
Raise the front wheel off the ground a ...
Wheel balance check and adjustment
Check and adjust the wheel balance in the following
procedures:
removal the wheel assembly. Refer to “front wheel assembly removal and
installation” and “rear wheel assembly removal and installation” .
Remove the mounting drum from the rear wheel.
(For rear wheel) ref ...