Yamaha 440 Service Manual download pdf (Page 53)

1980

SRX440

b. Secondary spring tension

The secondary spring tension can be

changed by

moving the spring position

from

the free position in order to reset

the clutch shifting RPM as required. The

four holes are spaced at intervals

of

30°.

Secondary spring

Spring

wind

position

No.1

30°.

150°.270°

No.2

60°.180°

No.3

90°.210°

No.4

0°.120°.240°

Winding

the spring more (e.q..

from

30°

to

60°)

will

increase the

clutch

shifting

rpm and

vise versa.

Snow

conditions

will

also require a change

of

the

spring

tension in order to

attain

the standard

shifting rpm. The spring tension

must

be

greater on

wet

snow

than on packed

snow.

4. Reassembly

a. Grease the sliding

sheave boss and se-

condary shaft. and

mount

the

sliding

sheave on the shaft.

Recommended grease:

Molybdenum

disulfide

snowmobile

grease

b. Install the sliding

sheave to the fixed

sheave. and set

the

spring and spring

seat as specified. (See

"Secondary

sheave spring

adjustment"

of

above

item)

c. Install the circlip secondary fixed

sheave

boss slit.

5-9

NOTE:------------

After

installation,

thoroughly

clean both fixed

and sliding

sheaves so

that

they

are free

of

oil.

d. Install the secondary

sheave assembly

and

adjust

the axial play and sheave

off

set.

(Refer to

5-1-A-2.

"Sheave

off

set ad-

justment")

e. Tighten

the

secondary sheave

mounting

bolt.

Tightening

torque:

50

Nm

(5.0 m-kg)

E.

Chain

housing

1. Disassembly

a.

Remove'

the chain housing cap and

drain

the

chain housing oil.

b.

Apply

the

brake and remove the drive

sprocket

nut

and driven sprocket bolt.

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