Yamaha WR250F Owner's Service Manual

Also see for wr250f: Owner's service manual Owner's service manual Owner's service manual Owner's service manual Owner's service manual

Contents

PERIODIC MAINTENANCE3-4EAS2GB2080MAINTENANCE INTERVALS FOR COMPETITION USETIP• The following schedule is intended as a general guide to maintenance and lubrication. Bear in mindthat such factors as weather, terrain, geographical location, and individual usage will alter the re-quired maintenance and lubrication intervals. If you are a doubt as to what intervals to follow inmaintaining and lubricating your machine, consult your Yamaha dealer.• Periodic inspection is essential in making full use of the machine performance. The service life ofthe parts varies substantially according to the environment in which the machine runs (e.g., rain,dirt, etc.). Therefore, earlier inspection is required by reference to the list below.ITEMAfterbreak-inEveryraceEverythird(or500km)Everyfifth(or1,000km)As re-quired RemarksENGINE OILReplaceVALVESCheck the valveclearances The engine must be cold.Inspect Check the valve seats andvalve stems for wear.ReplaceVALVE SPRINGSInspect Check the free length and thetilt.ReplaceVALVE LIFTERSInspect Check for scratches and wear.ReplaceCAMSHAFTS Inspect the camshaft surface.Inspect Inspect the decompressionsystem.ReplaceCAMSHAFTSPROCKETSInspect Check for wear on the teethand for damage.ReplacePISTON Inspect crack.Inspect Inspect carbon deposits andeliminate them.CleanReplaceIt is recommended that the pis-ton pin and ring are also re-placed at the same time.PISTON RINGInspect Check ring end gap.Replace