Yamaha YFM45FAR, Service Manual

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SPEC
Cam 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)
Valve, valve seat, valve guide:
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 Limit
Head Diameter
B
Face Width
C
Seat Width
D
Margin Thickness
A
MAINTENANCE SPECIFICATIONS