Periodic maintenance and adjustment59ESU11461Periodic maintenance chart for the emission control systemItems marked with an asterisk should be performed by a Yamaha dealer as they require specialtools, data and technical skills.ITEM REMARKSINITIAL EVERYPAGE1 monthor 800 km(500 mi)(40 hr)Seasonallyor4000 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 (25000mi) 78* Crankcase breathersystem• Check breather hose for cracksor damage.• Replace if necessary.—* Fuel filter (RST90) • Check condition.• Replace if necessary. —* Fuel line• Check fuel hose for cracks ordamage.• Replace if necessary.—* Idle speed (RST90) • Check and adjust idle speed. 69*Fuel injection(RS90P / RS90PLT /RST90PGT)• Check synchronization.• Adjust if necessary. —* Carburetors(RST90)• Adjust synchronization. —• Adjust the jets.Whenever operatingcondition (elevation/tem-perature) is changed.77* Exhaust system• Check for leakage.• Tighten or replace gasket ifnecessary.—
