Yamaha 440 Service Manual download pdf (Page 14)

8. Piston pin and bearing inspection

a. Check

the

pin

for

signs

of

wear. If any

wear

is evident. replace pin and bearing.

1980 SRX440

Tightening torque:

First:

10

Nm (1.0

m-kg)

Final:

22

Nm (2.2

m-kg)

Tightening

torque:

40

Nm

(4.0 m-kg)

.

c.

After

reassembly,

apply

a liberal coating

of

two-stroke

oil

to

the

crank pin, bear-

ing and

into

each crankshaft bearing oil

delivery hole.

d. Check crankshaft

for

freedom

of

move-

ment.

7. Engine bracket

installation

Install the engine brackets in

the

correct

position.

2-8

b. Check the pin and bearing

for

signs

of

heat

discoloration. If excessive (indenta-

tion

on pin, etc.). replace pin and bear-

In.

c. Check

the

bearing cage

for

excessive

wear

or damage. Check the rollers

for

signs

of

flat

spots. If such

wear

is found,

replace pin and bearing.

d.

Apply

a

light

film

of

oil to pin and bear-

ing surfaces. Install

them

in connecting

rod small end to

inspect

for

wear. Check

for

play. There should be no noticeable

vertical play. If play exists, check con-

necting

rod small end

for

wear. Replace

pin,

connecting

rod

and/or

bearing, as

required.

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