User manual YAMAHA YZ250F-2002

[. . . ] In addition, the many tips given in this manual will help to keep your motorcycle in the best possible condition. If you have any further questions, do not hesitate to contact your Yamaha dealer. The Yamaha team wishes you many safe and pleasant rides. So, remember to put safety first! IMPORTANT MANUAL INFORMATION Particularly important information is distinguished in this manual by the following notations: The Safety Alert Symbol means ATTENTION! [. . . ] Remove the fuel tank bolts, then lift the fuel tank upward. (Do not remove the fuel hoses. ) EW000071 1. Remove the right air intake duct by loosening and removing the screw clamps. @ q q WARNING Support the fuel tank carefully during this procedure. Do not tilt the fuel tank too much or pull it too hard because the fuel hose connections may become loose causing fuel leakage. @ 6-13 PERIODIC MAINTENANCE AND MINOR REPAIR Recommended anti-freeze: High quality ethylene glycol antifreeze containing corrosion inhibitors for aluminum engines. Antifreeze and water mix ratio: 1:1 Total amount: 1. 95 L Coolant reservoir capacity: 0. 55 L ECA00041 1. Remove the radiator cap. EW000067 1. Cylinder drain bolt (× 2) WARNING Do not remove the radiator cap when the engine is hot. @ @ 13. Install the water pump drain bolt and cylinder drain bolts and tighten to the specified torque. Tightening torque: Drain bolt: 10 Nm (1. 0 m·kg) 14. Pour the recommended coolant into the radiator until it is full. 10. Remove the water pump drain bolt and drain the coolant. Recommended oil: SAE 10W30 type SE motor oil WARNING Make sure that the fuel hoses and vacuum hose are properly connected, in place and not pinched. If a hose is damaged, be sure to replace it. @ @ 6 6-16 PERIODIC MAINTENANCE AND MINOR REPAIR EAU00630 Carburetor adjustment The carburetors are important parts of the engine and require very sophisticated adjustment. Most adjustments should be left to a Yamaha dealer who has the professional knowledge and experience to do so. However, the idle speed may be adjusted by the owner as part of routine maintenance. EAU01335 EC000095 1. Air intake duct Air vent hose If dust or water collects in this hose, remove the hose and clean it. 6 EC000093 Air intake duct Check that the screen of the intake duct is not blocked. Clean the screen if necessary. CAUTION: Do not operate the motorcycle with the air vent hose removed. @ @ CAUTION: The carburetors were set at the Yamaha factory after many tests. If they are changed, poor engine performance and damage may result. @ @ 6-17 PERIODIC MAINTENANCE AND MINOR REPAIR EAU00632 Idle speed adjustment 1. Start the engine and warm it up for a few minutes at approximately 1, 000 to 2, 000 r/min. Occasionally rev the engine to 4, 000 to 5, 000 r/min. The engine is warm when it quickly responds to the throttle. 1. [. . . ] 6-22 O Oil level indicator circuit check . . . . . . . . . . . . . . . . . 3-4 Oil level indicator light. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 P Parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 Pass switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]