Adjust the engine idle speed periodically on the engine at normal operating temperature.
To adjust the idle speed:

Engine oil and filter change
Throtile cable playDTC “c41” (p2505): ecm power input signal
malfunction
Detected condition and possible cause
Detected condition
Possible cause
C41/P2505
No voltage is applied to the ecm.
Lead wire/coupler connection of ecm terminal to fuel
fuse.
Fuel fuse.
Wiring diagram
Troubleshooting
C ...
Clutch cable removal and installation
Removal
Remove the left side cowling. Refer to “exterior parts removal and
installation” in section 9d .
Disconnect the clutch cable from the clutch lever.
Refer to “handlebar removal and installation” in section 6b .
Remove the clutch cable as shown in the throttle cable ro ...
Cam chain tensioner inspection
Inspect the cam chain tensioner in the following
procedures:
remove the cam chain tensioner. Refer to “cam chain guide / cam chain
tensioner removal and installation” .
Check the contacting surface of the cam chain
tensioner. If it is worn or damaged, replace it with a
new ...