Inspect exhaust control valve initially at 1 000 km (600 miles, 2 months) and every 12 000 km (7 500 miles, 24 months) thereafter
Inspect exhaust control valve as follows:


Exhaust pipe bolt and muffler bolt inspection
Valve clearance inspection and adjustmentRod guide case tightening torque
Tighten the rod guide case in the following procedures:
measure the effective length l of the torque wrench.
Calculate the reading torque on the torque wrench by
use of the formula shown below.
Special tool
(a): 09940–84710 (rod guide case
wrench)
T: reading torque on the torq ...
Open circuit check
Possible causes for the open circuit are as follows. As
the cause can exist in the connector/coupler or terminal,
they need to be checked carefully.
Loose connection of connector/coupler.
Poor contact of terminal (due to dirt, corrosion or rust,
poor contact tension, entry of f ...
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 ...