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2-14 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Throttle Bore Cleaning
•
Check the throttle bore for cleanliness as follows:
○
Remove
the throttle body assy (see Fuel System (DFI)
chapter).
○
Check the main throttle valves and throttle bores [A] for
carbo
n deposits by opening the main valves.
If any carbon accumulates, wipe the carbon off the throt-
tle bores and throttle valves, using a cotton pad [B] pen-
etra
ted with a high-flash point solvent. Be careful not to
remove molybdenum disulfide coat (black) [C] from the
throttle valves and the bores.
Fron
t of Throttle Body [D]
CAUTION
Do not
rub these surfaces hard and do not use a car-
buretor cleaning solution, which dam age molybde-
num disulfide coat; instead, use a high-flash point
clea
ning solution and wipe slowly.
Idle Speed Inspection
•
Start the engine and warm it up thoroughly.
•
With the engine idling, turn the handlebar to both sides.
If handlebar movement changes the idle speed, the
throttle cables may be improperly adjusted or incorrectly
routed or damaged. Be sure to correct any of these
conditions before riding (see Cable, Wire, and Hose
Routing section in the Appendix chapter).
WARNING
Operation with improperly adjusted, incorrectly
routed or damaged cables could result in an unsafe
r
iding condition.
•
Check idle speed.
If the idle speed is out of the specified range, adjust it.
Idle Speed
Standard: 1 100 ± 50 r/min (rpm)
Idle Speed Adjustment
•
Start the engine and warm it up thoroughly.
•
Turn the adjusting screw [A] until the idle speed is correct.
○
Open and close the throttle a few times to make sure that
the idle speed is within the specified range. Readjust if
necessary.
Front [B]