User manual YAMAHA RS VIKING PROFESSIONAL-2008

[. . . ] OWNER'S MANUAL VK10X LIT-12628-02-66 8GS-28199-11 ESU10040 Introduction ESU10120 Congratulations on your purchase of a Yamaha snowmobile. This model is the result of Yamaha's vast experience in the production of fine sporting and touring snowmobiles. 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 snowmobile. [. . . ] Check the coloration on the white porcelain insulator around the center electrode. The ideal coloration at this point is a medium to a light tan color for a snowmobile that is being ridden normally. If a spark plug shows a distinctly different color, there could be something wrong with the engine. Spark plug reach 40 Periodic maintenance Before installing any spark plug, measure the electrode gap with a wire thickness gauge and adjust to specification. Spark plug gap: 0. 7­0. 8 mm (0. 028­0. 031 in) When installing the spark plug, always clean the gasket surface. Wipe off any grime from the threads and tighten the spark plug to the specified torque. Spark plug tightening torque: 12. 5 Nm (1. 25 m·kfg, 9 ft·lb) ECS00380 1. Throttle stop screw Standard engine idling speed: 1300­1500 r/min ESU11821 CAUTION: Make sure that the spark plug caps are securely installed. Otherwise the spark plug caps could be damaged due to engine vibration. ESU11792 Adjusting the throttle cable free play ECS00410 CAUTION: Be sure to adjust the engine idling speed first. Turn the adjusting bolt in or out until the specified throttle cable free play is obtained. Adjusting the engine idling speed ECS00390 CAUTION: G G G Be sure to have a Yamaha dealer make this adjustment. Start the engine and warm it up. 1. NOTE: Refer to the "Starting the engine" section on page 28. Turn the throttle stop screw in or out to adjust the engine idling speed. 1. Throttle cable free play Throttle cable free play: 2. 0­3. 0 mm (0. 08­0. 12 in) 3. Tighten the locknut. 41 Periodic maintenance ESU11861 Checking the throttle override system (T. O. R. S. ) Check the T. O. R. S. for proper operation. EWS00351 WARNING When checking the T. O. R. S. : G Make sure that the parking brake is applied. G Do not rev the engine to the point that the clutch engages, otherwise the snowmobile could start moving, which could cause an accident. 1. Throttle lever 1. Start the engine. NOTE: Refer to the "Starting the engine" section on page 28. Hold the pivot point of the throttle lever away from the throttle switch by putting your thumb (above) and forefinger (below) between the throttle lever pivot and the engine stop switch housing. While holding the pivot point as described above, press the throttle lever gradually. The T. O. R. S. will be activated and the engine speed will be limited to less than the clutch engagement speed. (See page 72 for the clutch engagement speed. ) EWS00361 WARNING If the engine speed does not decrease to less than the clutch engagement speed, stop the engine by turning the main switch to the off position and consult a Yamaha dealer. ESU11871 Checking the air filter Always check that there is no snow under the air filter element frame. Unhook the air filter case cover fasteners. 42 Periodic maintenance NOTE: After riding the snowmobile, make sure that there is no snow under the air filter element frame. ESU11910 Carburetors The carburetors are an important part of the engine and its emission control system, which require very sophisticated adjustment. [. . . ] The warranty on a new Yamaha cannot be "voided" or "canceled. " However, if a particular failure is caused by operation or maintenance other than as shown in the Owner's Manual, that failure may not be covered under warranty. YAMAHA MOTOR CORPORATION, U. S. A. Post Office Box 6555 Cypress, California 90630 76 Consumer information Q. Explain the operation, maintenance, and warranty requirements to your satisfaction at the time of sale, and upon your request at any later date. In addition, each Yamaha snowmobile dealer is held responsible for his setup, service and warranty repair work. [. . . ]