User manual YAMAHA TTR125-2003

[. . . ] If you have any questions concerning the operation or maintenance of your motorcycle, please consult a Yamaha dealer. The design and manufacture of this Yamaha motorcycle fully comply with the emissions standards for clean air applicable at the date of manufacture. Yamaha has met these standards without reducing the performance or economy of operation of the motorcycle. To maintain these high standards, it is important that you and your Yamaha dealer pay close attention to the recommended maintenance schedules and operating instructions contained within this manual. [. . . ] Spark plug wrench To check the spark plug 1. Check that the porcelain insulator around the center electrode of the spark plug is a medium-to-light tan (the ideal color when the vehicle is ridden normally). NOTE: If the spark plug shows a distinctly different color, the engine could be operating improperly. Do not attempt to diagnose such problems yourself. Instead, have a Yamaha dealer check the vehicle. To install the spark plug 1. Measure the spark plug gap with a wire thickness gauge and, if necessary, adjust the gap to specification. 1. Remove the spark plug as shown, with a spark plug wrench available at a Yamaha dealer. Spark plug gap: 0. 6­0. 7 mm (0. 024­0. 028 in) 6-5 PERIODIC MAINTENANCE AND MINOR REPAIR 2. 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. Tightening torque: Spark plug: 12. 5 Nm (1. 25 m·kgf, 9. 0 ft·lbf) EAU39840 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. Place the motorcycle on a level surface and hold it in an upright position. Sponge material WARNING Use only a dedicated parts cleaning solvent. To avoid the risk of fire or explosion, do not use gasoline or solvents with a low flash point. ECA10510 CAUTION: To avoid damaging the foam material, handle it gently and carefully, and do not twist or wring it. 6 1. Pull the sponge material and the mesh out. 3. Clean the mesh with solvent, and then wipe the solvent off. Clean the sponge material with solvent, and then squeeze the remaining solvent out. 5. Apply oil of the recommended type to the entire surface of the sponge material, and then squeeze the excess oil out. 6-8 PERIODIC MAINTENANCE AND MINOR REPAIR EAU40421 NOTE: The sponge material should be wet but not dripping. Recommended oil: Yamaha foam air filter oil or other quality foam air filter oil Cleaning the spark arrester The spark arrester should be cleaned at the intervals specified in the periodic maintenance and lubrication chart. EWA10980 WARNING G 6. Insert the mesh and the sponge material into the air filter case. ECA15571 1. Air filter check hose G CAUTION: G 6 G Make sure that the mesh and the sponge material are properly seated in the air filter case. The engine should never be operated without the mesh and the sponge material installed, otherwise the piston(s) and/or cylinder(s) may become excessively worn. 2. If dirt or water is visible, remove the hose, clean it, and then install it. Always let the exhaust system cool prior to touching exhaust components. Do not start the engine when cleaning the exhaust system. NOTE: Make sure to select a well-ventilated area free of combustible materials to clean the spark arrester. [. . . ] 6-23 Wheel (front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26 Wheel (rear) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28 Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14 D Drive chain, cleaning and lubricating . . . . 6-19 Drive chain slack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]