Page 58 of 99

PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6 6. Remove the seat. (See page 3-12
for seat removal and installation
procedures.)
7. Remove the coolant reservoir by
removing the bolts.
8. Remove the coolant reservoir
hose clamp and disconnect the
hose.
9. Drain the coolant from the coolant
reservoir by turning it upside
down.
10. Install the hose and connect the
coolant reservoir hose clamp. 11. Drain the coolant completely and
thoroughly flush the cooling sys-
tem with clean tap water.
12. If the washers are damaged, re-
place them. Tighten the water
pump drain bolt and cylinder drain
bolt to the specified torques.
13. Pour the recommended coolant
into the radiator until it is full.
ECA00041
CAUTION:@ Hard water or salt water is harmful
to the engine. You may use soft wa-
ter if you can’t get distilled water. @14. Run the engine several minutes.
Stop the engine and recheck the
coolant level in the radiator. If it is
low, add more coolant until it
reaches the top of the radiator.
15. Fill the coolant reservoir with cool-
ant up to maximum level.
16. Install the radiator cap, radiator
cap stopper bolt and coolant res-
ervoir cap.
17. Check for coolant leakage. If any
leakage is found, ask a Yamaha
dealer to inspect the cooling sys-
tem.
1. Coolant reservoir
2. Bolt
3. Coolant reservoir hose clamp
4. Hose
Tightening torque:
Water pump and cylinder drain
bolts:
10 Nm (1.0 m·kg)
Recommended antifreeze:
High quality ethylene glycol
antifreeze containing corrosion
inhibitors for aluminum engines.
Antifreeze and water mixing ratio:
1 : 1
Total amount:
1.7 L
Coolant reservoir capacity:
0.3 L
E_4tx_Periodic.fm Page 12 Saturday, October 16, 1999 9:37 AM
Page 80 of 99

PERIODIC MAINTENANCE AND MINOR REPAIR
6-34
6
Engine overheating
EW000070
WARNING
@ Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be blown
out under pressure, which could cause serious injury. Open the radiator cap as follows. Wait until the engine has
cooled. Remove the radiator cap stopper by removing the screw. Place a thick rag like a towel over the radiator cap
and slowly rotate the cap counterclockwise to the detent. This procedure allows any residual pressure to escape.
When the hissing sound has stopped, press down on the cap while turning counterclockwise and remove it. @NOTE:@ If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is changed to the recom-
mended coolant as soon as possible. @
Wait until the
engine has cooled.
Check the coolant level in the
reservoir tank and/or radiator.
Level is OK.Level is low, check the
cooling system for leakage.
No
leakage.Leakage.
Ask a Yamaha dealer to inspect
and repair the cooling system.Add coolant. (See NOTE.)
Restart the engine. If the engine overheats again, ask a
Yamaha dealer to inspect and repair the cooling system.
E_4tx_Periodic.fm Page 34 Saturday, October 16, 1999 9:37 AM
Page 92 of 99
SPECIFICATIONS
8-4
8
Bulb voltage, wattage ´ quantity
Headlight 12 V, 55 W ´ 2
Auxiliary light 12 V, 5 W ´ 1
Tail/brake light 12 V, 5/21 W ´ 2
Turn signal light 12 V, 21 W ´ 4
Meter light 12 V, 2 W ´ 3
Neutral indicator light 14 V, 1.4 W ´ 1
High beam indicator light 14 V, 1.4 W ´ 1
Turn indicator light 14 V, 1.4 W ´ 2
Coolant temperature
indicator light 14 V, 1.4 W ´ 1
Fuel indicator light 12 V, 2 W ´ 1
Fuses
Main fuse 30 A
Headlight fuse 15 A
Signaling system fuse 15 A
Ignition fuse 10 A
Hazard light fuse 10 A
Odometer fuse 5 A
Radiator fan fuse 7.5 A
E_4tx_Spec.fm Page 4 Saturday, October 16, 1999 9:38 AM
Page 97 of 99

10-INDEXAAir filter .................................................. 6-13
Antitheft alarm (optional) ..........................3-5BBattery ................................................... 6-28
Brake and clutch lever lubrication........... 6-25
Brake and shift pedal lubrication ............ 6-25
Brake fluid replacement ......................... 6-23
Brake light switch adjustment ................. 6-21CCable inspection and lubrication ............ 6-24
Carburetor adjustment ........................... 6-15
Care.........................................................7-1
Changing the coolant ............................. 6-11
Checking the front and
rear brake pads ................................... 6-21
Clutch lever ..............................................3-8
Clutch lever free play adjustment ........... 6-19
Controls/Instruments ................................2-3
Coolant temperature indicator light...........3-2
Cooling system ...................................... 6-10
Cowling and panel removal and
installation .............................................6-5
Cowlings A and B ....................................6-5DDiagnosis device......................................3-5
Dimmer switch .........................................3-6
Drive chain lubrication ............................ 6-24
Drive chain slack adjustment.................. 6-23
Drive chain slack check.......................... 6-23
EEngine break-in ....................................... 5-5
Engine oil ................................................ 6-8
Engine overheating ................................. 6-34
Engine stop switch................................... 3-7FFront brake lever ..................................... 3-9
Front fork adjustment............................. 3-14
Front fork inspection .............................. 6-27
Fuel ....................................................... 3-11
Fuel gauge .............................................. 3-5
Fuel indicator light ................................... 3-3
Fuel tank breather hose
(for Germany only) .............................. 3-12
Fuel tank cap ......................................... 3-10
Fuse replacement.................................. 6-29GGive safety the right of way ..................... 1-1HHandlebar switches ................................. 3-6
Dimmer switch ................................... 3-6
Engine stop switch ............................. 3-7
Hazard switch .................................... 3-6
Horn switch ........................................ 3-6
Lights switch ...................................... 3-7
Pass switch ........................................ 3-6
Start switch ........................................ 3-7
Turn signal switch .............................. 3-6
Hazard switch .......................................... 3-6
Headlight bulb replacement ................... 6-30
Helmet holder ........................................ 3-13
High beam indicator light ..........................3-2
Horn switch ..............................................3-6IIdentification number records ...................9-1
Idle speed adjustment ............................6-15
Indicator lights ..........................................3-2
Coolant temperature indicator light .....3-2
Fuel indicator light...............................3-3
High beam indicator light ....................3-2
Neutral indicator light ..........................3-2
Turn indicator lights ............................3-2
Inspecting the brake fluid level ...............6-22KKey identification number .........................9-1LLeft view...................................................2-1
Lights switch ............................................3-7
Luggage strap holders ...........................3-17MMain switch/steering lock .........................3-1
Model label ..............................................9-2NNeutral indicator light ...............................3-2PPanels A and B ........................................6-6
Parking.....................................................5-6
Pass switch ..............................................3-6
Periodic maintenance and lubrication .......6-2
Pre-operation check list ............................4-1
E_4txIX.fm Page 1 Saturday, October 16, 1999 9:38 AM