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 playStarter clutch inspection
Refer to “starter clutch removal and installation” .
Starter clutch
Install the starter driven gear onto the starter clutch.
Turn the starter driven gear by hand to inspect the
starter clutch for a smooth movement. The gear
turns in one direction only. If a large resistance is felt
...
DTC “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 ...
Cam chain guide / cam chain tensioner
removal and installation
Removal
Remove the cylinder head cover. Refer to “engine top side disassembly” .
Remove the cam chain guide no. 2 (1).
Remove the cylinder head. Refer to “engine top side disassembly”
and “engine bottom side disassembly” .
Remove the starter clutch. Refer to “s ...