Control functions24Your Yamaha engine has been designed touse regular unleaded gasoline with a pumpoctane number [(R+M)/2] of 86 or higher, or aresearch octane number of 91 or higher.CAUTION:ECS00080 Oxygenated fuels (gasohol) containinga maximum 5% of ethanol can be used,although richer jetting may be requiredto prevent engine damage. Consult aYamaha dealer. Gasohol containingmethanol is not recommended. Make sure that snow or ice does not en-ter the fuel tank when refueling. Do not use alcohol deicers or water ab-sorbing additives with oxygenated fuel. The fuel tank should be filled withstraight gasoline as specified.ESU10870SuspensionThe suspension can be adjusted to suit riderpreference. A softer setting, for example, mayprovide greater rider comfort, while a hardersetting may allow more precise handling andcontrol over certain types of terrain or ridingconditions.WARNINGEWS00150Be sure to have a Yamaha dealer make thisadjustment.This shock absorber contains highly pres-surized nitrogen gas. It could explode byimproper handling, causing injury, orproperty damage. Do not tamper with or attempt to openthe shock absorber. Do not subject the shock absorber to anopen flame or other high heat source,which could cause it to explode. Do not deform or damage the shock ab-sorber in any way. Do not dispose of a worn or damagedshock absorber by yourself. Take theunit to a Yamaha dealer.ESU10890Adjusting the ski spring preloadCAUTION:ECS00250The left and right ski spring preload mustbe set to the same setting. Uneven set-tings can cause poor handling and loss ofstability.The spring preload can be adjusted by turningthe spring preload adjusting ring.1. Filler tube2. Fuel levelRecommended fuel:REGULAR UNLEADED GASOLINEONLYFuel tank capacity:35.6 L (9.41 US gal) (7.83 Imp.gal)