Maintenance Specifications; Engine - Yamaha YP250 Service Manual

MAINTENANCE SPECIFICATIONS

ENGINE

Item
Cylinder head:
Warp limit
Cylinder:
Bore size
Out of round limit
Camshaft:
Cam dimensions
Intake "A"
"B"
"C"
Exhaust "A"
"B"
"C"
Camshaft runout limit
Cam chain:
Cam chain type/No. of links
Rocker arm/rocker armshaft:
Rocker arm inside diameter
Rocker shaft outside diameter
Rocker arm-to-rocker armshaft
clearance
Valve, valve seat, valve guide:
Valve clearance (cold)
Valve dimensions
"A" head diameter
"B" face width
"C" seat width
"D" margin thickness
Stem outside diameter
Guide inside diameter
MAINTENANCE SPECIFICATIONS
Standard
SSS
69.000 X 69.005 mm
SSS
36.545 X 36.645 mm
30.021 X 30.121 mm
6.524 mm
36.547 X 36.647 mm
30.067 X 30.167 mm
6.48 mm
SSS
DID SCSA-0404A SDH/104
12.000 X 12.018 mm
11.981 X 11.991 mm
0.009 X 0.012 mm
0.08 X 0.12 mm
IN
0.16 X 0.20 mm
EX
Face Width
33.9 X 34.1 mm
IN
28.4 X 28.6 mm
EX
3.394 X 3.960 mm
IN
3.394 X 3.960 mm
EX
0.9 X 1.1 mm
IN
0.9 X 1.1 mm
EX
0.8 X 1.2 mm
IN
0.8 X 1.2 mm
EX
5.975 X 5.990 mm
IN
5.960 X 5.975 mm
EX
6.000 X 6.012 mm
IN
6.000 X 6.012 mm
EX
Seat Width
2-4
SPEC
Limit
0.03 mm
69.1 mm
0.03 mm
36.45 mm
29.92 mm
SSS
36.45 mm
29.97 mm
SSS
0.03 mm
SSS
12.03 mm
11.995 mm
SSS
SSS
SSS
Margin Thickness
SSS
SSS
SSS
SSS
SSS
SSS
SSS
SSS
5.94 mm
5.92 mm
6.05 mm
6.05 mm