User manual YAMAHA 20DEMO SERVICE MANUAL

[. . . ] This model is the result of Yamaha's vast experience in the production of fine sporting, touring, and pacesetting racing machines. It represents the high degree of craftsmanship and reliability that have made Yamaha a leader in these fields. This manual will give you an understanding of the operation, inspection, and basic maintenance of this motorcycle. If you have any questions about the operation or maintenance of your motorcycle, please consult a Yamaha dealer. 1 EAA10500 EUU13800* Particularly important information is distinguished in this manual by the following notations: Q The Safety Alert Symbol means ATTENTION! [. . . ] Check operation and adjust brake lever free play. Check operation and adjust brake pedal free play. 16, 000 km*** Check balance/damage/runout/spoke tightness. Check bearing assembly for looseness/damage. Replace if damaged. EVERY 2, 000 km 2 2 2 2 2 2 2 2 2 2 2 2 * Rear brake * Rear arm pivot * Wheels * Wheel bearings 2 2 39 INITIAL ITEM REMARKS 500 km 2, 000 km EVERY 4, 000 km 8, 000 km * Steering bearing * Front forks * Rear shock absorber Drive chain * Fittings/Fasteners * Centerstand and sidestand * Battery *: **: ***: Check bearing assembly for looseness. Check all chassis fitting and fasterners. Check that the breather pipe is working properly. Correct if necessary 2 2 2 2 2 EVERY 500 km 2 2 2 2 2 2 2 2 2 2 2 It is recommended that these items be serviced by a Yamaha dealer. (bearing type) Lithium soap base grease. (bush type) 40 EAH48201* Engine oil 1. Place the motorcycle on the centerstand. Install the element in its case. cC 9 If oil is not applied to the element, the engine damage may occur. 9 Make sure the element is properly seated in the filter case. 9 The engine should never be run without the air filter element installed; excessive piston and/or cylinder wear may result. 45 EAH92200 Throttle cable adjustment EUU06400 NOTE: Before adjusting the throttle cable free play, the engine idling speed should be adjusted. The throttle cable should have a specified free play in the turning direction at the grip flange. If the free play is incorrect, ask a Yamaha dealer to make adjustment. Free play: 3~7 mm 46 EAH92300 Carburetor adjustment The carburetor is a vital part of the engine and requires very sophisticated adjustment. Most adjustments should be left to a Yamaha dealer who has the professional knowledge and experience to do so. Standard idle speed: 1, 400~1, 600 r/min 1 Tachometer EAH92000 Idle speed adjustment 1. Set the idle to the specified engine speed by adjusting the throttle stop screw; turn the screw in to increase engine speed, and out to decrease engine speed. 1 Throttle stop screw 47 EAH20304 Standard spark plug: C7HSA/NGK U22FS-U/DENSO Spark plug inspection The spark plug is an important engine component and is easy to inspect. The condition of the spark plug can indicate the condition of the engine. The ideal color on the white insulator around the center electrode is a medium-to-light tan color for a motorcycle that is being ridden normally. [. . . ] The fuse case is located inside the right sidecover. If a fuse is blown, turn off the ignition switch and the switch of the circuit in question. Turn on the switches and see if the electrical device operates. If the fuse immediately blows again, consult a Yamaha dealer. EUU34400 Specified fuse: 7A cC Do not use fuses of higher amperage rating than those recommended. [. . . ]