Yamaha YZF690-U Owner's Manual

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Periodic maintenance and adjustment6-176EAU21386Checking the throttle grip freeplayMeasure the throttle grip free play asshown.Periodically check the throttle grip freeplay and, if necessary, have a Yamahadealer adjust it.EAU21403Valve clearanceThe valves are an important enginecomponent, and since valve clearancechanges with use, they must bechecked and adjusted at the intervalsspecified in the periodic maintenancechart. Unadjusted valves can result inimproper air-fuel mixture, enginenoise, and eventually engine damage.To prevent this from occurring, haveyour Yamaha dealer check and adjustthe valve clearance at regular intervals.TIPThis service must be performed whenthe engine is cold.EAU64412TiresTires are the only contact between thevehicle and the road. Safety in all con-ditions of riding depends on a relativelysmall area of road contact. Therefore, itis essential to maintain the tires in goodcondition at all times and replace themat the appropriate time with the speci-fied tires.Tire air pressureThe tire air pressure should bechecked and, if necessary, adjustedbefore each ride.WARNINGEWA10504Operation of this vehicle with im-proper tire pressure may cause se-vere injury or death from loss ofcontrol. The tire air pressure must bechecked and adjusted on coldtires (i.e., when the temperatureof the tires equals the ambienttemperature). The tire air pressure must beadjusted in accordance with theriding speed and with the total1. Throttle grip free playThrottle grip free play:3.0–5.0 mm (0.12–0.20 in)111