Yamaha YFM400FAR Service Manual

Also see for YFM400FAR: Owner's manual Service manual Assembly manual

Contents

2 - 5SPECCam chain:Cam chain type/No. of links DID SCR-0409 SDH/116 ----Cam chain adjustment method Automatic ----Rocker arm/rocker arm shaft:Bearing inside diameter 12.000 ~ 12.018 mm(0.4724 ~ 0.4731 in)12.078 mm(0.4755 in)Shaft outside diameter 11.981 ~ 11.991 mm(0.4717 ~ 0.4721 in)11.951 mm(0.4705 in)Arm-to-shaft clearance 0.009 ~ 0.037 mm(0.0004 ~ 0.0015 in)0.080 mm(0.0031 in)Valves, valve seats, valve guides:Valve clearance (cold) IN 0.06 ~ 0.10 mm(0.0024 ~ 0.0039 in)----EX 0.16 ~ 0.20 mm(0.0063 ~ 0.0079 in)----Valve dimensions“A” head diameter IN 39.9 ~ 40.1 mm(1.5708 ~ 1.5787 in)----EX 33.9 ~ 34.1 mm(1.3346 ~ 1.3425 in)----“B” face width IN 2.26 mm (0.0890 in) ----EX 2.26 mm (0.0890 in) ----“C” seat width IN 1.2 ~ 1.4 mm(0.0472 ~ 0.0551 in)1.6 mm(0.0630 in)EX 1.2 ~ 1.4 mm(0.0472 ~ 0.0551 in)1.6 mm(0.0630 in)“D” margin thickness IN 1.0 ~ 1.4 mm(0.0394 ~ 0.0551 in)----EX 0.8 ~ 1.2 mm(0.0315 ~ 0.0472 in)----Stem outside diameter IN 6.975 ~ 6.990 mm(0.2746 ~ 0.2752 in)6.950 mm(0.2736 in)EX 6.955 ~ 6.970 mm(0.2738 ~ 0.2744 in)6.915 mm(0.2722 in)Guide inside diameter IN 7.000 ~ 7.012 mm(0.2756 ~ 0.2761 in)7.030 mm(0.2768 in)EX 7.000 ~ 7.012 mm(0.2756 ~ 0.2761 in)7.030 mm(0.2768 in)Stem-to-guide clearance IN 0.010 ~ 0.037 mm(0.0004 ~ 0.0015 in)0.080 mm(0.0031 in)EX 0.030 ~ 0.057 mm(0.0012 ~ 0.0022 in)0.100 mm(0.0039 in)Item Standard LimitHead DiameterBFace WidthCSeat WidthDMargin ThicknessAMAINTENANCE SPECIFICATIONS