Special tool

SpecificationsAir cleaner
The air cleaner element must be
kept clean to provide good engine
power and g1as mileage. If you use
your motorcycle under normal
low-stress conditions, you should
service the air cleaner at the intervals
specified. If you ride in dusty,
wet, or muddy conditions, you will
need to inspect the ...
Fi system troubleshooting
Customer complaint analysis
Record details of the problem (failure, complaint) and how it occurred as
described by the customer. For this purpose,
use of such an inspection form such as following will facilitate collecting
information to the point required for proper
analysis and diagnosis.
...
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.
...