Yamaha XVS6501997 - Page 25

2-5
MAINTENANCE SPECIFICATIONS
SPEC
Head Dia Face width Seat Width
Margin Thickness
Item Standard Limit
Timing chain:
Timing chain type/No. of links
Timing chain adjustment method
SILENT CHAIN/118
Automatic
SSS
SSS
Rocker arm/rocker arm shaft:
Bearing inside diameter
Shaft outside diameter
Arm-to-shaft clearance
14.000 mm X 14.018 mm
13.980 mm X 13.991 mm
0.009 mm X 0.038 mm
SSS
SSS
SSS
Valve, valve seat, valve guide:
Valve clearance (cold) IN
EX
0.07 X 0.12 mm
0.12 X 0.17 mm
SSS
SSS
Valve dimensions:
“A” head diameter IN
EX
“B” face width IN
EX
“C” seat width IN
EX
“D” margin thickness IN
EX
Stem outside diameter IN
EX
Guide inside diameter IN
EX
Stem-to-guide clearance IN
EX
Stem runout limit
36.9 X 37.1 mm
31.9 X 32.1 mm
2.3 mm
2.3 mm
1.0 X 1.2 mm
1.0 X 1.2 mm
1.0 X 1.4 mm
1.0 X 1.4 mm
6.975 X 6.990 mm
6.960 X 6.975 mm
7.000 X 7.012 mm
7.000 X 7.012 mm
0.010 X 0.037 mm
0.025 X 0.052 mm
SSS
SSS
SSS
SSS
SSS
1.8 mm
1.8 mm
0.8 mm
0.8 mm
6.955 mm
6.935 mm
7.042 mm
7.042 mm
0.08 mm
0.10 mm
0.03 mm
Valve seat width IN
EX
1.0 X 1.2 mm
1.0 X 1.2 mm
1.8 mm
1.8 mm
Valve spring:
Free length IN
EX
Set length (valve closed) IN
EX
43.2 mm
43.2 mm
37.1 mm
37.1 mm
42.0 mm
42.0 mm
SSS
SSS