Yamaha YZ250FM 2021 Owner's Service Manual

PRE-OPERATION INSPECTION AND MAINTENANCE3-5EAM20134PRE-OPERATION INSPECTION AND MAINTENANCEBefore riding for break-in operation, practice or a race, make sure the machine is in good operating con-dition.Before using this machine, check the following points.EAM30209GENERAL INSPECTION AND MAINTENANCETIPPerform usual maintenance enough so that, in the race course, a confirmation of that and simple settingadjustments may only be left, in order to get enough time to use effectively.Item Inspect PageCoolant Check that coolant is filled up to the radiator cap. Check thecooling system for leakage.3-20, 3-21, 3-21,6-4, 6-4Fuel Check that a fresh gasoline is filled in the fuel tank. Checkthe fuel line for leakage. 1-24Engine oil Check that the oil level is correct. Check the crankcase andoil line for leakage. 3-13, 3-13Gear shifter and clutch Check that gears can be shifted correctly in order and thatthe clutch operates smoothly. 3-15, 3-15Throttle grip/HousingCheck that the throttle grip operation and free play are cor-rectly adjusted. Lubricate the throttle grip and housing, ifnecessary.3-11, 3-33Brakes Check the play of front brake and effect of front and rearbrake.3-23, 3-23, 3-24,3-24, 3-24, 3-24,3-25, 3-25Drive chain Check drive chain slack and alignment. Check that thedrive chain is lubricated properly.3-26, 4-68, 4-68,4-69, 4-69, 4-69Wheels Check for excessive wear and tire pressure. Check forloose spokes and have no excessive play.3-32, 3-33, 3-33,3-33Steering Check that the handlebar can be turned smoothly and haveno excessive play. 3-27Front forks and rearshock absorberCheck that they operate smoothly and there is no oil leak-age.3-28, 3-28, 3-30,3-30, 3-32Cables (wires)Check that the clutch and throttle cables move smoothly.Check that they are not caught when the handlebars areturned or when the front forks travel up and down. —Exhaust pipe Check that the exhaust pipe is tightly mounted and has nocracks. 3-18Rear wheel sprocket Check that the rear wheel sprocket tightening bolt is notloose.4-10, 4-10, 4-10,4-10, 4-11, 4-11Lubrication Check for smooth operation. Lubricate if necessary. 3-33, 3-34, 3-34,3-34Bolts and nuts Check the chassis and engine for loose bolts and nuts. 1-27Lead connectors Check that the stator coil assembly, ECU and ignition coilare connected tightly. 1-11SettingsIs the machine set suitably for the condition of the racingcourse and weather or by taking into account the results oftest runs before racing? Are inspection and maintenancecompletely done?10-1, 10-1, 10-1,10-2, 10-2, 10-3,10-3, 10-4, 10-4,10-6, 10-7