Yamaha SRX440 1980 Service Manual page 55

Many rough surfaces or unfavorable
snow conditions; the driven/drive
sprocket ratio should be made larger.
Few rough surfaces or better snow con-
ditions; the ratio should be made smal-
ler.
1980 SRX440
a. Std. reduction ratios
Drive chain sprocket
18 (P!N 878-17682-80)
Driven chain sprocket
29 (P!N 878-47648-90)
Chain (Links) 70 (P!N 94860-36070)
b. A guide to reduction ratios
Trail riding
Lake course
Hiqh altitude
(Up to 1500 m or more)
. Snow condition ICY Packed Wet ICY Packed Wet ICY Packed Wet
Drive chain sprocket Std. Std.
17
Std. Std.
17 or
16 16
16
Std.
Driven chain sprocket Std.
Std.
Std. Std. Std. Std. 33 33
33
Chain (links) Std. Std.
Std. Std. Std. Std.
Std.
Std. Std.
c. Sprocket ratio and chain link chart
The following sprockets, drive and
driven, and chains are available as op-
tions. The figures in upper lines repre-
sent the driven/drive sprocket ratios,
while those in lower lines represent the
number of chain links.
•••••
.
" -.......
Teeth of drive
......
~
15 16 17 18
19 20 21 22
P/N878.
P/N878-,
piN 878.
(SRX440 PIN 878-
P/N878.
P/NoBl8"_
P!N,878~
Teeth of
17682-50 17682~60
17682-70 Std.)
17682-90 17693"00
17693-10 17693-20
driven sprocket
29
'.933 1.813 1.706 1.611
1.526
1.450
1.381 1.318
(SRX440 Std.)
68 68
68 or 70
70
70
70
_70
or
72
72
31
2,067
1.938
1.824 1.722
1.632
1.550 1.476
1,409
PIN 878-47587-00
68
70
70 70
70
or
72
72
72
72
33
2.200 2.063 1.941
1.833
1.737
1.650
1.571
1.500
PIN 888-47587-00
70 70
70 or 72
72 72
72
72 or 74
74
35
2.333
2.188 2.059
1.944
1.842
1.750
1.667
1.591
.
PIN 878-47587-20
72
72 72 72 or 74
72 or 74 74 74 or 76 74 or 76
.
.
Chain links
Parts No.
68
94850-36068
72 94850-35072
74 94850-35074
-:
4. Reassembly
a. Apply a low temperature grease to the
chain housing oil seal lip. Install the se-
condary shaft complete with brake disc.
N O T E : - - - - - - - - - - - -
Make sure woodruff key is properly seated in
key way of secondary shaft. Install brake disc
so that it is aligned with the woodruff key.
b. Use the four bolts to mount the chain
housing to frame.
5-11
Tightening torque:
23 Nm (2.3 m-kg)
c. Install the brake caliper assembly.
Brake caliper mounting bolt
tightening torque:
50 Nm (5.0 m-kg)
.