PERIODIC MAINTENANCE AND MINOR REPAIR
6-15
6
EAU00632
Idle speed adjustment1. Start the engine and warm it up for
a few minutes at approximately
1,000 to 2,000 r/min. Occasionally
rev the engine to 4,000 to
5,000 r/min. The engine is warm
when it quickly responds to the
throttle.
2. Set the idle to the specified engine
speed by adjusting the throttle
stop screw. Turn the screw in di-
rection a
to increase engine
speed and in direction b
to de-
crease engine speed.
NOTE:@ If the specified idle speed cannot be
obtained by performing the above ad-
justment, consult a Yamaha dealer. @
EAU00635
Throttle cable free play
inspectionThere should be a free play of 3 ~
7 mm at the throttle grip. If the free play
is incorrect, ask a Yamaha dealer to
make this adjustment.
1. Throttle stop screw
Standard idle speed:
1,100 r/min (except for F, S, SF, D)
1,050 r/min (for F, S, SF, D)
a. Free play
E_4sv_Periodic.fm Page 15 Tuesday, August 31, 1999 3:45 PM
PERIODIC MAINTENANCE AND MINOR REPAIR
6-36
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_4sv_Periodic.fm Page 36 Tuesday, August 31, 1999 3:45 PM
10-INDEXAAir filter ..................................................6-12BBattery ................................................... 6-27
Brake and clutch lever lubrication........... 6-25
Brake and shift pedal lubrication ............ 6-24
Brake fluid replacement ......................... 6-22
Brake light switch adjustment ................. 6-19CCable inspection and lubrication ............ 6-24
Carburetor adjustment ...........................6-14
Care.........................................................7-1
Checking the front and rear brake
pads ....................................................6-20
Clutch lever .............................................. 3-9
Controls/Instruments ................................2-3
Coolant ..................................................6-11
Coolant temperature gauge ..................... 3-7
Cowling A ................................................6-5
Cowling B ................................................6-5
Cowling C ................................................6-6
Cowling removal and installation .............. 6-5DDiagnosis device......................................3-7
Dimmer switch .........................................3-8
Drive chain lubrication ............................6-24
Drive chain slack adjustment..................6-23
Drive chain slack check.......................... 6-23EEngine break-in........................................ 5-5
Engine oil ................................................. 6-9
Engine stop switch................................... 3-9
EXUP (EXhaust Ultimate Powervalve)... 3-19FFront brake lever ................................... 3-10
Front fork adjustment............................. 3-15
Front fork inspection .............................. 6-26
Front wheel installation .......................... 6-31
Front wheel removal .............................. 6-31
Fuel ....................................................... 3-12
Fuel indicator circuit check....................... 3-5
Fuel indicator light ................................... 3-4
Fuel tank breather hose
(for Germany only) .............................. 3-13
Fuel tank cap ......................................... 3-11
Fuse replacement.................................. 6-28GGive safety the right of way ..................... 1-1HHandlebar switches ................................. 3-8
Dimmer switch ................................... 3-8
Engine stop switch ............................. 3-9
Horn switch ........................................ 3-8
Lights switch ...................................... 3-9
Pass switch ........................................ 3-8
Start switch ........................................ 3-9
Turn signal switch .............................. 3-8
Headlight bulb replacement ................... 6-29
Helmet holder ........................................ 3-14
High beam indicator light ......................... 3-2
Horn switch ............................................. 3-8
IIdentification number records ...................9-1
Idle speed adjustment ............................6-15
Indicator lights ..........................................3-2
Fuel indicator light...............................3-4
High beam indicator light ....................3-2
Neutral indicator light ..........................3-2
Oil level indicator light .........................3-2
Turn indicator light ..............................3-2
Inspecting the brake fluid level ...............6-21KKey identification number .........................9-1LLeft view...................................................2-1
Lights switch ............................................3-9
Luggage strap holders ...........................3-19MMain switch/steering lock .........................3-1
Model label ..............................................9-2NNeutral indicator light ...............................3-2OOil level indicator circuit check .................3-3
Oil level indicator light ..............................3-2PParking.....................................................5-6
Pass switch ..............................................3-8
Periodic maintenance and lubrication .......6-2
Pre-operation check list............................. 4-1
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