User manual YAMAHA YZ450F-2003

[. . . ] In addition, the many tips given in this manual will help 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! [. . . ] Coolant reservoir capacity: 0. 45 L CAUTION: q If coolant is not available, use distilled water or soft tap water instead. Do not use hard water or salt water since it is harmful to the engine. q If water has been used instead of coolant, replace it with coolant as soon as possible, otherwise the engine may not be sufficiently cooled and the cooling system will not be protected against frost and corrosion. q If water has been added to the coolant, have a Yamaha dealer check the antifreeze content of the coolant as soon as possible, otherwise the effectiveness of the coolant will be reduced. NOTE: q The radiator fan is automatically switched on or off according to the coolant temperature in the radiator. q When the engine is idling with the starter (choke) turned on, the radiator fan will automatically be switched on and off regardless of the coolant temperature, but this does not indicate a malfunction. q If the engine overheats, see page 6-44 for further instructions. @ @ 6 @ 6-12 PERIODIC MAINTENANCE AND MINOR REPAIR 1. Coolant drain bolt 6 To change the coolant 1. Place the motorcycle on a level surface and let the engine cool if necessary. (See pages 6-5 and 6-6 for cowling and panel removal and installation procedures. ) 3. Place a container under the engine to collect the used coolant. 4. Remove the radiator cap and coolant reservoir cap. EW000067 7. Bolt (rear) EAU03162 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. (See page 3-14 for rider seat removal and installation procedures. ) 2. Remove the bolt at the front of the fuel tank and loosen the bolt at the rear. 6 6-15 PERIODIC MAINTENANCE AND MINOR REPAIR EC000082 @ 1. Air filter case cover EW000071 CAUTION: q Make sure that the air filter element is properly seated in the air filter case. q The engine should never be operated without the air filter element installed, otherwise the piston(s) and/or cylinder(s) may become excessively worn. Install the air filter case cover by installing the screws and bolt. Place the fuel tank in the original position, and then install the bolt at the front and tighten the bolt at the rear. @ WARNING Make sure that the fuel tank is well supported. q Do not tilt or pull the fuel tank too much, otherwise the fuel hoses may come loose, which could cause fuel leakage. q 5. Lightly tap the air filter element to remove most of the dust and dirt, and then blow the remaining dirt out with compressed air as shown. If the air filter element is damaged, replace it. [. . . ] 5-4 Right view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Troubleshooting charts. . . . . . . . . . . . . . . . . . . . . . . . . . 6-43 Turn signal light bulb, replacing . . . . . . . . . . . . . 6-37 V Valve clearance, adjusting . . . . . . . . . . . . . . . . . . . . [. . . ]