Yamaha T135 Service Manual MAINTENANCE SPECIFICATIONS Item
SPEC
Standard
Valve spring Free length
IN/EX
Installed length (valve closed) IN/EX Compressed spring force IN/EX
Limit
47.33 mm (1.86 in)
IN/EX
Winding direction
IN/EX
Clockwise
m Ya
Tilt limit “*”
35.30 mm (1.39 in) 135.6 – 156.0 N (13.8 – 15.8 kgf) at 35.3 mm (1.39 in) ----
Piston Piston-to-cylinder clearance
44.96 mm (1.77 in) ------2.0 mm (0.08 in)
----
0.015 – 0.048 mm (0.0006 – 0.0019 in)
ah
Piston size “D” Measuring point “H” Offset D Offset direction Piston pin bore inside diameter
0.150 mm (0.0059 in) 53.962 – 53.985 mm (2.1245 – 2.1254 in) ---5.0 mm (0.1969 in) ---0.25 mm (0.0098 in) ---Intake side ---14.002 – 14.013 mm (0.5513– 0.5517 in) 14.043 mm (0.5529 in) 13.995 – 14.000 mm (0.5510– 0.5512 in) 13.975 mm (0.5502 in)
H
13
aT
Piston pin outside diameter
C 5.
B
M
T
Ring side clearance (installed) 2nd ring Ring type Dimensions (B × T) End gap (installed) Ring side clearance
Barrel 0.80 × 1.90 mm (0.03 × 0.07 in) 0.10 – 0.25 mm (0.0098 in) (0.00-0.01 in)
O
Piston rings Top ring Ring type Dimensions (B × T) End gap (installed)
0.030 – 0.065 mm (0.0012-0.0026 in)
Taper B 0.80 × 2.15 mm (0.03 × 0.08 in) T
0.10 – 0.25 mm (0.0098 in) (0.00-0.01 in) 0.020 – 0.055 mm (0.0008-0.0022 in)
B Oil ring T Dimensions (B × T) 1.50 × 1.95 mm (0.06 × 0.08 in) End gap (installed of oil ring rails) 0.20 – 0.70 mm (0.01 – 0.03 in)
YamahaT135.COM
2-6
------0.40 mm (0.0157 in) 0.10 mm (0.0039 in) ------0.40 mm (0.0157 in) 0.10 mm (0.0039 in) -------