Yamaha YZ250FM 2021 Owner's Service Manual

MAINTENANCE INTERVALS3-211 * Cylinder head• Check the coolant passages forcorrosion.• Inspect carbon deposits and elim-inate them.• Check for warpage, and replacethe gasket.12 * Cylinder• Inspect score marks. • Inspect wear. 13 Engine oil• Check the engine oil amount.  • Replace.  14 Oil filter element • Replace.  15 * Oil strainer • Clean. 16 * Clutch• Inspect housing, friction plate,clutch plate and spring.  • Replace. 17 * Transmission• Inspect. • Replace bearings. 18 * Shift fork, shift cam,guide bar• Inspect wear. 19 * Nut (generator rotor) • Check for tightening torques.  20 * Exhaust pipe,silencer, protector• Check for exhaust leaks, andtightening torques.  • Clean. • Replace fiver.(When the exhaust soundbecomes louder or when a perfor-mance drop is felt.) 21 * Crankshaft • Inspect and clean.  22 * Throttle body • Inspect. 23 Air filter• Clean and lubricate.  • Replace. 24 Spark plug• Check the electrodes and the ter-minals for wear.  • Replace. 25 * Cooling system• Check coolant level and leakage.  • Check radiator cap operation. • Check radiator cap attached.  • Change the coolant. Every two years • Inspect hoses. 26 * Engine guard • Replace. 27 * Frame • Clean and inspect.  28 * Fuel tank, fuel pump • Inspect.  29 * Fuel hose• Inspect. • Replace. Every four years No. Item Routine Afterbreak-inEveryrace(about 2.5hours)Everythird race(about 7.5hours)Everyfifth race(about 12.5hours)Asrequired