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Periodic maintenance and adjustment
ESU11462
Periodic maintenance chart for the emission control system
Items marked with an asterisk should be performed by a Yamaha dealer as they require spe-
cial tools, data and technical skills.
ITEM
Spark plugs
*
Valve clearance
Crankcase breath-
*
er system
*
Fuel filter (RST90)
*
Fuel line
*
Idle speed (RST90)
Fuel
injection(RST90TF /
*
RST90TFL /
RST90TFY)
Carburetors
*
(RST90)
*
Exhaust system
56
REMARKS
• Check condition.
• Adjust gap and clean.
• Replace if necessary.
• Check and adjust valve clear-
ance when engine is cold.
• Check breather hose for
cracks or damage.
• Replace if necessary.
• Check condition.
• Replace if necessary.
• Check fuel hose for cracks or
damage.
• Replace if necessary.
• Check and adjust idle speed.
• Check synchronization.
• Adjust if necessary.
• Adjust synchronization.
• Adjust the jets.
• Check for leakage.
• Tighten or replace gasket if
necessary.
INITIAL
EVERY
Seasonally
1 month
or
or 800 km
4000 km
(500 mi)
(2500 mi)
(40 hr)
(200 hr)
Every 40000 km (25000
mi)
Whenever operating
condition (eleva-
tion/temperature) is
changed.
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