Yamaha PZ50MW Service Manual download pdf (Page 25)

2-7

INSP

ADJ

COOLING SYSTEM/VALVE CLEARANCE ADJUSTMENT

Air bleeding steps:

• Remove the cap

1

on the radiator outlet pipe 1.

• While slowly adding coolant to the coolant filler,

drain the coolant until no more air bubbles

appear.

• Install the cap

1

.

• Add coolant to the full level

a

.

• Install the coolant filler cap.

Apply and lock the parking brake. Start the

engine and run it at approximately 1,700 ~

3,500 r/min until the coolant circulates (approxi-

mately 3 ~ 5 minutes). The heat exchanger will

be warm to the touch.

WARNING

To avoid severe injury or death:

• Make sure the machine is securely supported

with a suitable stand.

• Do not exceed 3,500 r/min. Drive line damage

and excessive V-belt wear could occur, or the

machine could unexpectedly move forward if

the clutch engages.

• Operate the engine only in a well-ventilated

area.

• Remove the coolant filler cap and bleed the

cooling system again, as described above.

No air bubbles

→

OK.

• Pour coolant into the coolant reservoir

2

until

the coolant level reaches the “COLD LEVEL”

mark

b

.

1

b

2

VALVE CLEARANCE ADJUSTMENT

NOTE:

• Valve clearance adjustment should be made on a

cold engine, at room temperature.

• When the valve clearance is to be measured or

adjusted, the piston must be at the top dead cen-

ter (TDC) on the compression stroke.

1. Drain:

• Engine oil

Refer to “ENGINE OIL REPLACEMENT”.

2. Remove:

• Fuel tank

Refer to “SEAT AND FUEL TANK” in CHAP-

TER 5. (PZ50/PZ50GT/PZ50FX/PZ50M)

Refer to “RIDER SEAT AND FUEL TANK” in

CHAPTER 5. (PZ50VT/PZ50MP)

• Oil tank

Refer to “A.C. MAGNETO ROTOR AND

STARTER CLUTCH” in CHAPTER 5.

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