Precautions for clutch system
Refer to “general precautions” in section 00 (page 00-1).
Schematic and routing diagram
Clutch cable routing diagram
Refer to “throttle cable routing diagram” in section 1d .
Diagnostic information and procedures
Clutch system symptom diagnosis

ClutchCam chain guide inspection
Inspect the cam chain guide in the following procedures:
remove the cam chain guides. Refer to “cam chain guide / cam chain
tensioner removal and installation” .
Check the contacting surface of the cam chain
guides. If it is worn or damaged, replace it with a new
one.
...
Front brake master cylinder / brake lever disassembly and assembly
Refer to “front brake master cylinder assembly removal and installation” .
Disassembly
Remove the reservoir cap (1), plate (2), diaphragm
(3) and reservoir tank (4).
Remove the brake light switch (5) and brake lever
(6).
Remove the dust boot (7) and push rod (8).
  ...
DTC “c28” (p1655): secondary throttle
valve actuator (stva) malfunction
Detected condition and possible cause
Detected condition
Possible cause
The operation voltage does not reach the stva.
Ecm does not receive communication signal from the
stva. Stva can not operate properly or its motor locked
Stva malfunction.
...