Snowmobile Yamaha FX10X, FX10RTX, FX10RTRX, FX10RTRAX, FX10MTX, FX10MTRX, FX10MTRAX. Manual - part 64

5-76

ENG

CRANKSHAFT AND BALANCER SHAFT

8. Install:

• Primary sheave drive shaft assembly 1 

(to the crankshaft 2)

NOTE:

Align the shallow groove 

a in the primary drive

shaft assembly with the low spline 

b of the crank-

shaft.

a

b

1

2

9. Install:

• Crankshaft 1 

(with primary sheave drive shaft assembly)

NOTE:

• Align the punch mark 

a of the balancer drive

gear 2 on the crankshaft with the punch mark 

b

of the balancer driven gear 3.

• Align the hole 

c in the bearing 4 with the projec-

tion 

d on the upper crankcase.

a

b

1

2

3

d

c

4

6-1

COOL

COOLING SYSTEM

RADIATOR

Order

Job name/Part name

Q’ty

Remarks

Radiator removal

Remove the parts in the order listed below.

Coolant

Drain.

Refer to “COOLING SYSTEM” in CHAPTER 
2.

Steering column

Refer to “STEERING” in CHAPTER 3.

1

Radiator cap

1

2

Coolant reservoir hose

1

3

Coolant reservoir breather hose

1

4

Coolant reservoir cap

1

5

Coolant reservoir

1

6

Radiator cover

1

7

Plastic band

1

8

Radiator inlet hose

1

9

Radiator outlet hose

1

Disconnect.

10

Radiator fan motor coupler

1

Disconnect.

5

3

4

1

2

15

15

(4)

(4)

(4)

(4)

(4)

12

10

9

7

8

11

13

14

6

7 Nm (0.7 m 

•

 kg, 5.1 ft 

•

 lb)

È:   

È

È

È

È

È

RADIATOR

6

6-2

COOL

RADIATOR

Order

Job name/Part name

Q’ty

Remarks

11

Radiator

1

12

Radiator fan motor

1

13

DC back buzzer coupler

1

Disconnect.
Reverse model only

14

DC back buzzer

1

Reverse model only

15

Radiator stay

2

For installation, reverse the removal proce-
dure.

5

3

4

1

2

15

15

(4)

(4)

(4)

(4)

(4)

12

10

9

7

8

11

13

14

6

7 Nm (0.7 m 

•

 kg, 5.1 ft 

•

 lb)

È:   

È

È

È

È

È

6-3

COOL

RADIATOR

INSPECTION

1. Inspect:

• Radiator inlet hose
• Radiator outlet hose
• Coolant reservoir hose

Cracks/damage 

→ Replace.

2. Check:

• Radiator fins

Obstruction 

→ Clean.

Apply compressed air to the rear of the radia-
tor. 
Damage 

→ Repair or replace.

NOTE:

_ 

Straighten any flattened fins with a thin, flat-head
screwdriver.

3. Measure:

• Radiator cap opening pressure

Cap opens with a pressure below the speci-
fied pressure 

→ Replace.

4. Check:

• Radiator fan

Damage 

→ Replace.

Malfunction 

→ Check and repair.

Refer to “COOLING SYSTEM” in CHAPTER
8.

Measurement steps:

• Attach the radiator cap tester 1 and radiator

cap tester adapter 2 to the radiator cap 3.

• Apply the specified pressure for 10 seconds

and make sure there is no pressure drop.

Radiator cap opening pressure:

107.9 ~ 137.3 kPa
(1.08 ~ 1.37 kg/cm

2

, 15.3 ~ 19.5 psi)

Radiator cap tester:

90890-01325

Radiator pressure tester:

YU-24460-01

Radiator cap tester adapter:

90890-01352

Radiator pressure tester adapter:

YU-33984