Yamaha YP250 Service Manual page 27

Item
Stem-to-guide clearance
Stem runout limit
Valve seat width
Valve spring:
Free length (Inner)
Free length (Outer)
Set length (valve closed)
Set length (valve closed)
Compressed pressure
Tilt limit (Inner)
Tilt limit (Outer)
Piston:
Piston to cylinder
clearance
Piston size "D"
Measuring point "H"
Piston pin bore
inside diameter
Piston pin outside diameter
Piston rings:
Top ring:
Type
End gap (installed)
Side clearance (installed)
2nd ring:
Type
End gap (installed)
Side clearance
Oil ring:
End gap (installed)
Crankshaft:
Crank width "A"
Runout limit "C"
Big end side clearance "D"
MAINTENANCE SPECIFICATIONS
Standard
0.010 X 0.037 mm
IN
0.025 X 0.052 mm
EX
SSS
0.9 X 1.1 mm
IN
0.9 X 1.1 mm
EX
IN/EX 38.1 mm
IN/EX 36.93 mm
(Inner) IN/EX 30.1 mm
(Outer) IN/EX 31.6 mm
7.8 X 9.0 kg
(Inner) IN/EX
37.22 X 42.83 kg
(Outer) IN/EX
SSS
IN/EX
SSS
IN/EX
0.02 X 0.04 mm
68.965 X 68.980 mm
5 mm
17.004 X 17.015 mm
16.991 X 17.000 mm
Barrel
0.15 X 0.30 mm
0.04 X 0.08 mm
Taper
0.30 X 0.45 mm
0.03 X 0.07 mm
0.2 X 0.7 mm
59.95 X 60.00 mm
0.03 mm
0.35 X 0.85 mm
2-5
SPEC
Limit
0.08 mm
0.1 mm
0.01 mm
1.6 mm
1.6 mm
36.1 mm
35.0 mm
SSS
SSS
SSS
SSS
2.5_/1.7 mm
2.5_/1.7 mm
0.15 mm
SSS
SSS
17.045 mm
16.975 mm
SSS
0.45 mm
0.12 mm
SSS
0.7 mm
0.12 mm
SSS
SSS
SSS
SSS