Maintenance Specifications; Engine - Yamaha YQ50 Service Manual

MAINTENANCE SPECIFICATIONS

ENGINE

Cylinder head:
Warp limit
Cylinder:
Bore size
<Limit>
Taper limit
Piston:
Piston size
*
Measuring point
Piston clearance
<Limit>
Piston pin bore size
Piston pin:
Outside diameter
Piston ring:
Sectional sketch (BxT)/Type:
Top ring
2nd ring
End gap (installed):
Top ring
2nd ring
Side clearance (installed):
Top ring
2nd ring
Crankshaft:
Crank width "A"
Runout limit "C"
Connecting rod big end side clearance "D"
Big end radial clearance "E"
MAINTENANCE SPECIFICATIONS
Model
B
T
C
C
E
D
A
0.02 mm
*
Lines indicate straight edge measurements.
39.993 ~ 40.012 mm
<40.1 mm>
0.05 mm
39.957 ~ 39.977 mm
5 mm
0.029 ~ 0.042 mm
<0.1 mm>
10.004 ~ 10.019 mm
9.996 ~ 10.000 mm
1.5 ~ 1.8 mm
1.5 ~ 1.8 mm
0.15 ~ 0.35 mm
0.15 ~ 0.35 mm
0.03 ~ 0.05 mm
0.03 ~ 0.05 mm
37.90 ~ 37.95 mm
0.03 mm
0.2 ~ 0.5 mm
0.004 ~ 0.017 mm
2-4
SPEC
YQ50