Engine cooling symptom diagnosis

Schematic and routing diagramDTC “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.
...
Specifications
Service data
Clutch
unit: mm (in)
Tightening torque specifications
Note
the specified tightening torque is described in the following.
“Clutch control system components” “clutch components”
Reference: for the tightening torque of fastener not specified in this ...
Drive chain inspection and adjustment
Inspect drive chain
initially at 1 000 km (600 miles, 2 months) and every
6 000 km (4 000 miles, 12 months) thereafter
Drive chain visual check
With the transmission in neutral, support the
motorcycle using a jack and turn the rear wheel
slowly by hand.
Visually check the drive chain fo ...