Yamaha TT-R50E, Owner'S Service Manual

Page: 62 / 390

SPEC
2 - 7
Piston:
Piston to cylinder clearance 0.030 ~ 0.040 mm
(0.0012 ~ 0.0016 in) 0.15 mm
(0.0059 in)
Piston size “D” 35.960 ~ 35.980 mm
(1.4157 ~ 1.4165 in) ----
Measuring point “H” 5 mm (0.20 in) ----
Piston off-set 0.50 mm (0.0197 in) ----
Offset direction Intake side ----
Piston pin bore inside diameter 12.002 ~ 12.013 mm
(0.4725 ~ 0.4730 in) 12.043 mm
(0.4741 in)
Piston pin outside diameter 11.996 ~ 12.000 mm
(0.4723 ~ 0.4724 in) 11.976 mm
(0.4715 in)
Piston rings:
Top ring
Type Barrel ----
Dimensions (B
×
T) 0.80
×
1.60 mm
(0.031
×
0.063 in)
----
End gap (installed) 0.10 ~ 0.25 mm
(0.004 ~ 0.010 in) 0.50 mm
(0.020 in)
Side clearance (installed) 0.020 ~ 0.070 mm
(0.0008 ~ 0.0028 in) 0.12 mm
(0.0047 in)
2nd ring
Type Taper ----
Dimensions (B
×
T) 0.80
×
1.60 mm
(0.031
×
0.063 in)
----
End gap (installed) 0.15 ~ 0.30 mm
(0.006 ~ 0.012 in) 0.65 mm
(0.026 in)
Side clearance 0.020 ~ 0.060 mm
(0.0008 ~ 0.0024 in) 0.12 mm
(0.0047 in)
Item Standard Limit
H
D
T
B
B
T
MAINTENANCE SPECIFICATIONS