Inspect the camshaft sprocket in the following procedures:
If they are worn or damaged, replace the sprocket/ camshaft assembly and cam chain as a set.

Camshaft inspection
Cam chain tension adjuster inspectionStarter motor inspection
Refer to “starter motor disassembly and assembly” .
Carbon brush
Inspect the carbon brushes for abnormal wear, cracks or
smoothness in the brush holder.
If either carbon brush is defective, replace the brush
holder set with a new one.
Measure the length “a” of the carbon brushes using a
v ...
Diagnostic information and procedures
Starting system symptom diagnosis
Condition
Possible cause
Correction / reference item
Engine does not turn
though the starter motor
runs
Faulty starter clutch.
Replace.
Starter button is not
effective
Run down battery
Repair or replac ...
DTC “c91” (p0500): vehicle speed sensor
circuit malfunction
Detected condition and possible cause
Detected condition
Possible cause
Speedometer does not receive signal from the vehicle
speed sensor for more than 6 sec. When the motorcycle is
running. Ecm does not receive signal from the vehicle
speed sensor for more than ...