User manual YAMAHA MAJESTY250-2003

[. . . ] OWNER'S MANUAL YP250A 5SJ-28199-E1 EAU04576 INTRODUCTION Welcome to the Yamaha world of motorcycling!As the owner of the YP250A, you are benefiting from Yamaha's vast experience and newest technology regarding the design and manufacture of high-quality products, which have earned Yamaha a reputation for dependability. Please take the time to read this manual thoroughly, so as to enjoy all advantages of your YP250A. The owner's manual does not only instruct you in how to operate, inspect and maintain your scooter, but also in how to safeguard yourself and others from trouble and injury. [. . . ] In addition, the condition of the spark plug can reveal the condition of the engine. 1 1. Spark plug cap To remove the spark plug 1. (See page 6-8 for cowling removal and installation procedures. ) 2. Remove the spark plug cap. 6 6-12 PERIODIC MAINTENANCE AND MINOR REPAIR To check the spark plug 1. Check that the porcelain insulator around the center electrode of the spark plug is a medium-tolight tan (the ideal color when the scooter is ridden normally). NOTE: If the spark plug shows a distinctly different color, the engine could be defective. Do not attempt to diagnose such problems yourself. Instead, have a Yamaha dealer check the scooter. Check the spark plug for electrode erosion and excessive carbon or other deposits, and replace it if necessary. Specified spark plug: DR8EA (NGK) 1 a 1. Remove the spark plug as shown, with the spark plug wrench included in the owner's tool kit. To install the spark plug 1. Measure the spark plug gap with a wire thickness gauge and, if necessary, adjust the gap to specification. Clean the surface of the spark plug gasket and its mating surface, and then wipe off any grime from the spark plug threads. Install the spark plug with the spark plug wrench, and then tighten it to the specified torque. 6-13 PERIODIC MAINTENANCE AND MINOR REPAIR EAU04611 Tightening torque: Spark plug: 17. 5 Nm (1. 75 m·kgf) NOTE: If a torque wrench is not available when installing a spark plug, a good estimate of the correct torque is 1/4­1/2 turn past finger tight. However, the spark plug should be tightened to the specified torque as soon as possible. Install the cowling. Engine oil Engine oil The engine oil level should be checked before each ride. In addition, the oil must be changed at the intervals specified in the periodic maintenance and lubrication chart and when the oil change indicator light comes on. To check the engine oil level 1. NOTE: Make sure that the scooter is positioned straight up when checking the oil level. A slight tilt to the side can result in a false reading. Start the engine, warm it up for several minutes, and then turn it off. 6 6-14 PERIODIC MAINTENANCE AND MINOR REPAIR 1 1 4. If the engine oil is below the minimum level mark, add sufficient oil of the recommended type to raise it to the correct level. [. . . ] Remove the spark plug cap from the spark plug, and then install the spark plug and the spark plug cap. 7 w EWA00003 To prevent damage or injury from sparking, make sure to ground the spark plug electrodes while turning the engine over. 7-4 SCOOTER CARE AND STORAGE 5. Lubricate all control cables and the pivoting points of all levers and pedals as well as of the sidestand/centerstand. Check and, if necessary, correct the tire air pressure, and then lift the scooter so that both of its wheels are off the ground. Alternatively, turn the wheels a little every month in order to prevent the tires from becoming degraded in one spot. [. . . ]