Yamaha YFM660RN Service Manual page 27

Item
Camshaft runout limit
Timing chain:
Timing chain type/No. of links
Timing chain adjustment method
Rocker arm/rocker arm shaft:
Shaft outside diameter
Arm-to-shaft clearance
Valve, valve seat, valve guide:
Valve clearance (cold)
Valve dimensions
A
Head Diameter
"A" head diameter
"B" face width
"C" seat width
"D" margin thickness
Stem outside diameter
Guide inside diameter
MAINTENANCE SPECIFICATIONS
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75-RH2015/126
Automatic
11.976 ~ 11.991 mm
(0.4715 ~ 0.4721 in)
0.009 ~ 0.042 mm
(0.0004 ~ 0.0017 in)
IN 0.10 ~ 0.15 mm
(0.0039 ~ 0.0059 in)
EX 0.15 ~ 0.20 mm
(0.0059 ~ 0.0079 in)
B
Face Width
IN 29.9 ~ 30.1 mm
(1.1772 ~ 1.1850 in)
EX 31.9 ~ 32.1 mm
(1.2559 ~ 1.2638 in)
IN 2.25 mm (0.0886 in)
EX 2.26 mm (0.0890 in)
IN 0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
EX 0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
IN 0.85 ~ 1.15 mm
(0.0335 ~ 0.0453 in)
EX 0.85 ~ 1.15 mm
(0.0335 ~ 0.0453 in)
IN 5.975 ~ 5.990 mm
(0.2352 ~ 0.2358 in)
EX 5.960 ~ 5.975 mm
(0.2346 ~ 0.2352 in)
IN 6.000 ~ 6.012 mm
(0.2362 ~ 0.2367 in)
EX 6.000 ~ 6.012 mm
(0.2362 ~ 0.2367 in)
2 - 5
Standard
C
Seat Width
SPEC
Limit
0.03 mm
(0.0012 in)
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D
Margin Thickness
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1.6 mm
(0.0630 in)
1.6 mm
(0.0630 in)
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5.945 mm
(0.2341 in)
5.930 mm
(0.2335 in)
6.040 mm
(0.2378 in)
6.040 mm
(0.2378 in)