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Periodic maintenance and adjustment
59
ESU11461
Periodic maintenance chart for the emission control system
Items marked with an asterisk should be performed by a Yamaha dealer as they require special
tools, data and technical skills.
ITEM REMARKS
INITIAL EVERY
PAGE
1 month
or 800 km
(500 mi)
(40 hr)
Seasonally
or
4000 km
(2500 mi)
(200 hr)
Spark plugs
• Check condition.
• Adjust gap and clean.
• Replace if necessary.
68
* Valve clearance
• Check and adjust valve clear-
ance when engine is cold.
Every 40000 km (25000
mi)
77
*
Crankcase breather
system
• Check breather hose for cracks
or damage.
• Replace if necessary.
—
* Fuel filter (RST90)
• Check condition.
• Replace if necessary.
—
* Fuel line
• Check fuel hose for cracks or
damage.
• Replace if necessary.
—
* Idle speed (RST90) • Check and adjust idle speed. 69
*
Fuel injection
(RS90GT /
RS90LTGT /
RST90GT)
• Check synchronization.
• Adjust if necessary.
—
*
Carburetors
(RST90)
• Adjust synchronization. —
• Adjust the jets.
Whenever operating
condition (elevation/tem-
perature) is changed.
77
* Exhaust system
• Check for leakage.
• Tighten or replace gasket if
necessary.
—
U8JA11E0.book Page 59 Monday, June 14, 2010 10:22 AM