NOTE
Be sure the battery is fully charged.
If the subthrottle valves do not operate, check the subthrottle valve actuator resistance (see Subthrottle Valve Actuator Resistance Inspection).

Subthrottle Valve Actuator Removal
Subthrottle Valve Actuator Resistance InspectionUS, CA and CAL Models
1. Hold the water hose [A]. Insert the tab into the slot.
2. Hold the water hose [B]. Insert the tab into the slot.
3. Water Hose Fitting on Cylinder Head
4. Heat Insulation Rubber Plate
5. Run the crankshaft sensor lead and the oil pressure switch lead into the
slot, and hook the slot
on ...
Subthrottle Sensor Output Voltage Inspection
Measure the output voltage at the subthrottle sensor in
the same way as input voltage inspection, note the following.
Disconnect the subthrottle sensor connector and connect
the setting adapter [A] between these connectors.
Special Tool - Throttle Sensor Setting Adapter: 57001
-1538
...
Exhaust Device
This motorcycle is equipped with a
exhaust device system. This system
controls the valve in the exhaust pipe
and produces stable engine power at
low and middle engine speed. This exhaust
device is controlled by the ECU,
and adjustment or maintenance should
be done only by a competent mechanic ...