Yamaha SR500E 1978 Service Manual page 52

Valve springs:
Free length: Inner
Outer
Spring rate: Inner
Spring rate: Outer
Items Required < A I I o w a b l e »
Installed length (valve closed): Inner
Outer
Installed pressure (valve closed): Inner
Outer
Compressed length (valve open): Inner
Outer
Compressed pressure (valve open): Inner
Wire diameter: Inner
Outer
Winding outside diameter: Inner
Outer
Tilt limit from vertical: Inner
Outer
Cylinder:
Material
Bore size
45,3 mm < 4 3 . 9 m m » (1.783 in < 1 . 7 2 8 in»)
44.6 mm < 4 3 . 3 m m » (1.756 in <1 703 in>>)
K1 = 1.67, K2 = 2.12 [ k g / m m ]
(K1 = 93.5, K2 = 119 [lb/in])
K1 = 3.60, K2 = 4.63 [ k g / m m ]
(K1 = 202, K2 = 259 [Ib/in])
38.0 m m (1.496 in)
Taper limit
Out of round limit
40.0 m m (1.575 in)
12.2 kg (26.9 lb)
16.4 kg (36.2 lb)
28.0 m m (1.102 in)
30.0 m m (1.181 in)
33.4 kg (73.6 lb)
Piston:
Piston clearance
Outer
Piston clearance measuring position (from
piston skirt bottom)
Piston pin bore size
Piston pin outside diameter
Piston pin length
Over size piston diameter: 1 st
Over size piston diameter: 2nd
Over size piston diameter: 3rd
Over size piston diameter: 4th
Piston ring:
Piston ring design: Top ring
Piston ring design: 2nd ring
Piston ring design: Oil ring
Ring end gap (installed): Top ring
2nd ring
Oil ring
Ring groove side clearance: Top ring
2nd ring
62.7 kg (138.2 lb)
3.1 mm (O.122 in)
4.4 mm (O,173 in)
23,4 m m (0.921 in)
32.9 mm (1.295 in)
1.97 mm (0.0776 in)
1.97 m m (0.0776 in)
A l u m i n u m alloy w i t h special cast iron sleeve
87.00 ~ 87.02 m m <87.1 m m »
(3.4252 ~ 3 , 4 2 6 0 in < 3 . 4 2 9 in>>)
<O.05 m m » ( < 0 . 0 0 2 0 in>>)
<0.01 m m » ( < 0 . 0 0 0 4 in>>)
0 . 0 5 0 ~ O.O55 m m (O.OO20 ~ 0 . 0 0 2 2 in)
7.2 m m (0.283 in)
20.00 ~ 20.O2 m m < 2 0 . 0 8 m m »
( 0 . 7 8 7 4 ~ 0 . 7 8 8 2 in < 0 . 7 9 0 5 in>>)
19.99 ~ 2 0 . 0 0 < 1 9 . 9 6 m m »
( 0 . 7 8 7 0 ~ 0 , 7 8 7 4 in < 0 . 7 8 5 8 in»)
75 m m (2.95 in)
87.25 mm (3,4350 in)
87.50 m m (3.4449 in)
87.75 m m (3.4547 in)
88.00 m m (3.4646 in)
Plain ring
Plain ring
Oil ring w i t h expander
0.3 ~ 0.5 m m < 0 . 8 m m »
(0.012 ~ 0 . 0 2 0 in <0.O31 in>>)
0.3 ~ 0.5 m m < 0 . 8 m m »
(O.O12 ~ 0 . 0 2 0 in <O.031 in>>)
0.2 ~ 0.9 m m <1.O mm>>)
O . O 4 ~ 0.08 m m <O.15 m m »
(O.OO16 ~ O.OO31 in < 0 . 0 0 5 9 in>>)
0.03 ~ 0.07 m m <O.15 m m »
(0.0012 ~ 0 . 0 0 2 8 in < 0 . 0 0 5 9 in>>)
- 4 8 -