Yamaha Fz6 N Service Manual

TRANSMISSION
5-80
3. Install: Shift fork-R “1”
 Shift fork-L “2”
Drive axle “3”
 Shift fork guide bar
 Shift drum retainer
NOTE:
 Install shift fork-L into the groove in the 6th wheel gear and shift fork-R into the groove in 
the 5th wheel gear on the drive axle.
 Make sure that the drive axle bearing circlip 
“a” is inserted into the grooves in the upper 
crankcase.
4. Check: Transmission Rough movement 
→ Repair.
NOTE:
Oil each gear, shaft,  and bearing thoroughly.
Shift drum retainer bolt
10...

TRANSMISSION
5-81 

6
COOLING SYSTEM
RADIATOR.................................................................................................... 6-1
CHECKING THE RADIATOR.................................................................. 6-3
INSTALLING THE RADIATOR ................................................................ 6-3
OIL COOLER ................................................................................................ 6-4
CHECKING THE OIL COOLER...

RADIATOR
6-1
EAS26380
RADIATOR
Removing the radiator
Order Job/Parts to remove Q’ty RemarksSeat Refer to GENERAL CHASSIS on page 4-1.
Left front cowling inner panel (with cowling) Refer to GENERAL CHASSIS on page 4-1.
Right front cowling inner panel (with cowlin g) Refer to GENERAL CHASSIS on page 4-1.
Fuel tank Refer to FUEL TANK on page 7-1.
Air filter case Refer to GENERAL CHASSIS on page 4-1.
Coolant Drain.
Refer to CHANGING THE COOLANT on 
page 3-20.
1 Coolant reservoir hose 1
2 Thermo wax outlet...

RADIATOR
6-2
13 Coolant reservoir drain hose 1For installation, reverse the removal proce-
dure.
Removing the radiator
Order Job/Parts to remove Q’ty Remarks 

RADIATOR
6-3
EAS26390
CHECKING THE RADIATOR
1. Check: Radiator fins
Obstruction  → Clean.
Apply compressed air to the rear of the 
radiator.
Damage  → Repair or replace.
NOTE:
Straighten any flattened fins with a thin, flat-
head screwdriver.
2. Check:
 Radiator hoses
 Radiator pipes
Cracks/damage  → Replace.
3. Measure:
 Radiator cap opening pressure Below the specified pressure  → Replace 
the radiator cap.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the radiator cap tester “1” and radia-
tor cap...

OIL COOLER
6-4
EAS26410
OIL COOLER
Removing the oil cooler
Order Job/Parts to remove Q’ty RemarksRadiator assembly Refer to RADIATOR on page 6-1.
Coolant reservoir Refer to RADIATOR on page 6-1.
Engine oil Drain.
Refer to CHANGING THE ENGINE OIL on 
page 3-14.
1 Oil cooler outlet hose 1
2 Union bolt 1
3 Washer 1
4 Oil cooler 1
5O-ring 1
6 Oil cooler inlet hose 1
7 Oil cooler inlet pipe 1
8 Water jacket joint hose 1
9 Water jacket joint 1
10 O-ring 1
11 Water pump outlet hose 1
12 Radiator outlet hose 1...

OIL COOLER
6-5
EAS26420
CHECKING THE OIL COOLER
1. Check:Oil cooler
Cracks/damage  → Replace.
2. Check:  Oil cooler inlet hose
 Oil cooler outlet hose Cracks/damage/wear  → Replace.
EAS26430
INSTALLING THE OIL COOLER
1. Clean:
 Mating surfaces of the oil cooler and the 
crankcase
(with a cloth dampened with lacquer thin-
ner)
2. Install:
 O-ring 
Oil cooler “1”
 Washer “2”
 Union bolt “3”
NOTE:
 Before installing the oil cooler, lubricate the oil cooler bolt and O-ring with a thin coat of...

THERMOSTAT
6-6
EAS26440
THERMOSTAT
Removing the thermostat
Order Job/Parts to remove Q’ty RemarksSeat Refer to GENERAL CHASSIS on page 4-1.
Left front cowling inner panel (with cowling)+ Refer to GENERAL CHASSIS on page 4-1.
Right front cowling inner panel (with cowlin g) Refer to GENERAL CHASSIS on page 4-1.
Fuel tank Refer to FUEL TANK on page 7-1.
Air filter case Refer to GENERAL CHASSIS on page 4-1.
Coolant Drain.
Refer to CHANGING THE ENGINE OIL on 
page 3-14.
Throttle body assembly Refer to...

THERMOSTAT
6-7
EAS26450
CHECKING THE THERMOSTAT
1. Check: Thermostat “1”
Does not open at 71–85 °C (160–185 °F)  → 
Replace.
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a. Suspend the thermostat “3” in a container  “4” filled with water.
b. Slowly heat the water “2”.
c. Place a thermometer “1” in the water.
d. While stirring the water, observe the ther- mostat and thermometer’s indicated tem-
perature.
NOTE:
If the accuracy of the thermostat is in doubt, 
replace it. A faulty thermostat could cause seri-
ous...