User manual YAMAHA TTR125-2004

[. . . ] 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. [. . . ] Since heat and deposits will cause any spark plug to slowly erode, the spark plug should be removed and checked in accordance with the periodic maintenance and lubrication chart. In addition, the condition of the spark plug can reveal the condition of the engine. Check the spark plug for electrode erosion and excessive carbon or other deposits, and replace it if necessary. Specified spark plug: NGK/CR6HSA DENSO/U20FSR-U 1. 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. Remove the spark plug as shown, with the spark plug wrench included in the owner's tool kit. Spark plug gap: 0. 6­0. 7 mm (0. 024­0. 028 in) 6-7 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. If oil is leaking, immediately turn the engine off and check for the cause. 6-9 PERIODIC MAINTENANCE AND MINOR REPAIR EAU41632 EWA10430 Cleaning the air filter element The air filter element should be cleaned at the intervals specified in the periodic maintenance and lubrication chart. Clean the air filter element more frequently if you are riding in unusually wet or dusty areas. Remove the air filter case cover by removing the screws. 1. Air filter mesh 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. Apply oil of the recommended type to the entire surface of the sponge material, and then squeeze the excess oil out. NOTE: The sponge material should be wet but not dripping. Recommended oil: Yamaha foam air filter oil or other quality foam air filter oil 6 4. Clean the mesh with solvent, and then wipe the solvent off. Clean the sponge material with solvent, and then squeeze the remaining solvent out. 1. Pull the sponge material and the mesh out. 7. Insert the mesh and the sponge material into the air filter case. 6-10 PERIODIC MAINTENANCE AND MINOR REPAIR 2. [. . . ] 6-13 Care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Cowling and panel, removing and installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 M Main switch [TT-R90E(W)] . . . . . . . . . . . . . . . . . . . . . . 3-1 Maintenance and lubrication, periodic. . . . . 6-4 Maintenance, emission control system . . . 6-3 Maintenance, periodic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Model label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2 T Throttle cable free play, adjusting. . . . . . . . . 6-14 Throttle grip and cable, checking and lubricating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]