Snowmobile Yamaha Phazer PZ50W, PZ50GTW, PZ50FXW, PZ50MW, PZ50VTW, PZ50MPW. Manual - part 45

5-17

ENG

ENGINE ASSEMBLY

Installation steps:

• Install the engine mounting bolt spacer (front

left side).

• Install the engine assembly, and then install the

rear engine mounting bolt spacer.

• Install the rear engine mounting bolt and front

engine left mounting bolt.

• Install the engine mounting bolt spacer (front

right side) to the engine mounting bracket.

• Install the engine mounting bracket, and then

insert a rod 

a into the bracket hole to align the

engine assembly with the bracket. Use a 10 mm
(0.39 in) diameter rod that is approximately 130
mm (5.12 in) long.

• Install the engine mount spacer wrench 1.

• Tighten the rear engine mounting bolt spacer.

• Tighten the rear engine mounting nut.

• Tighten the front engine mounting bolt spacers

2 (right and left) until they come to contact with
the engine damper 3.

NOTE:

Do not apply torque to the front engine mounting
bolt spacers.

• Remove the rod from the engine mounting

bracket, and then install the front engine right
mounting bolt.

• Install the washers and nuts and then, tighten

the front engine mounting nuts (right and left).

Engine mount spacer wrench:

90890-01516, YS-01516

T

 

R

.

.

Rear engine mounting bolt spacer:

7 Nm (0.7 m · kg, 5.1 ft · lb)

T

 

R

.

.

Rear engine mounting nut:

40 Nm (4.0 m · kg, 29 ft · lb)

T

 

R

.

.

Front engine mounting nut:

40 Nm (4.0 m · kg, 29 ft · lb)

a

2

3

1

5-18

ENG

CAMSHAFTS

CAMSHAFTS

CYLINDER HEAD COVER

Order

Job name/Part name

Q’ty

Remarks

Cylinder head cover removal

Remove the parts in the order listed below.

Fuel tank

Refer to “SEAT AND FUEL TANK”. (PZ50/
PZ50GT/PZ50FX/PZ50M)
Refer to “RIDER SEAT AND FUEL TANK”. 
(PZ50VT/PZ50MP)

1

Cylinder identification sensor

1

2

Ignition coil

3

3

Spark plug

3

4

Cylinder head cover

1

5

Cylinder head cover gasket

1

6

Timing chain guide (top side)

1

For installation, reverse the removal proce-
dure.

New

4

2

1

3

5

Ê

Ë

È

É

New

10 Nm (1.0 m 

•

 kg, 7.2 ft 

•

 lb)

8 Nm (0.8 m 

•

 kg, 5.8 ft 

•

 lb)

13 Nm (1.3 m 

•

 kg, 9.4 ft 

•

 lb)

12 Nm (1.2 m 

•

 kg, 8.7 ft 

•

 lb)

È:   
É:   
Ê:   
Ë:   

LS

6

5-19

ENG

CAMSHAFTS

CAMSHAFTS

Order

Job name/Part name

Q’ty

Remarks

Camshaft removal

Remove the parts in the order listed below.

Engine

Refer to “ENGINE ASSEMBLY”.

1

Timing accessing screw

1

2

Crankshaft end accessing screw

1

3

Timing chain tensioner

1

4

Timing chain tensioner gasket

1

5

Intake camshaft cap

3

NOTE:

During removal, the dowel pins may still be
connected to the camshaft caps.

6

Exhaust camshaft cap

3

7

Dowel pin

4

8

Intake camshaft

1

9

Exhaust camshaft assembly

1

10

Intake camshaft sprocket

1

For installation, reverse the removal proce-
dure.

9 Nm (0.9 m 

•

 kg, 6.5 ft 

•

 lb)

24 Nm (2.4 m 

•

 kg, 17 ft 

•

 lb)

12 Nm (1.2 m 

•

 kg, 8.7 ft 

•

 lb)

È:   
É:   
Ê:   

M

5

8

10

6

7

9

1

2

3

4

È

È

Ê

É

E

E

M

M

LT

LT

New

New

New

7

5-20

ENG

CAMSHAFTS

REMOVAL

1. Remove:

• Timing accessing screw
• Crankshaft end accessing screw

2. Align:

• “I” mark 

a on the A.C. magneto rotor

(with the stationary pointer 

b on the A.C.

magneto cover)

NOTE:

• Turn the crankshaft counterclockwise.
• When piston #1 is at TDC on the compression

stroke, align the TDC mark 

a on the A.C. mag-

neto rotor with the stationary pointer 

b on the

A.C. magneto cover.

• TDC on the compression stroke can be found

when the camshaft lobes are turned away from
each other.

a

b

3. Remove:

• Timing chain tensioner 1 
• Gasket

1

4. Remove:

• Camshaft caps
• Dowel pins

CAUTION:

To prevent damage to the cylinder head, cam-
shafts or camshaft caps, loosen the camshaft
cap bolts in stages and in a crisscross pattern,
working from the outside in.

5. Remove:

• Intake camshaft 1 

(with camshaft sprocket)

• Exhaust camshaft 2 

NOTE:

To prevent the timing chain from falling into the
crankcase, fasten it with a wire 3.

1

2