Air Switching Valve Removal/Installation
Air Switching Valve Inspection
If the air switching valve [A] is normal, check the wiring for continuity (see Air Switching Valve Circuit).
Special Tool - Hand Tester: 57001-1394
If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection in the Fuel System (DFI) chapter).
If the ground and power supply are good, replace the ECU (see ECU Removal/Installation in the Fuel System (DFI) chapter).

Air Switching Valve Circuit

1. ECU
2. Air Switching Valve
3. Ignition Switch
4. Joint Connector F
5. Joint Connector A
6. Fuse Box 1
7. Ignition Fuse 15 A
8. Relay Box
9. ECU Main Relay
10. Frame Ground 1
11. Frame Ground 3
12. Starter Relay
13. ECU Fuse 15 A
14. Main Fuse 30 A
15. Battery
16. Engine Ground
Exhaust Butterfly Valve Actuator Resistance InspectionWheel Rotation Sensor Rotor Inspection
Remove:
Wheels (see Front/Rear Wheel Removal in the
Wheels/Tires chapter)
Brake Disc Mounting Bolts [A]
Sensor Rotor [B]
Front Wheel [C]
Rear Wheel [D]
Visually inspect the wheel rotation sensor rotor.
If the rotor is deformed or damaged (chipped teeth [A]),
replace the ...
Inquiries to Rider
Each rider reacts to problems in different ways, so it is important to
confirm what kind of condition
the rider is dissatisfied with.
Try to find out exactly what problem occurs under exactly what
conditions by asking the rider; knowing
this information may help you reproduce the prob ...
Swingarm Bearing, Sleeve Inspection
NOTICE
Do not remove the bearings for inspection. Removal
may damage them.
Inspect the needle bearings [A] and ball bearing installed
in the swingarm.
The rollers and ball in a bearing normally wear very little,
and wear is difficult to measure. Instead of measuring,
visually inspec ...