2006 YAMAHA YBR125 clutch

TABLE OF CONTENTSSAFETY INFORMATION ..................1-1
DESCRIPTION ..................................2-1
Left view ..........................................2-1
Right view ........................................2-2
Controls and instruments.................2-3
INSTRUMENT AND CONTROL
FUNCTIONS.......................................3-1
Main switch/steering lock ................3-1
Indicator lights ................................3-2
Speedometer unit ...........................3-2
Tachometer ....................................3-3
Fuel gauge ......................................3-3
Handlebar switches ........................3-3
Clutch lever .....................................3-4
Shift pedal .......................................3-4
Brake lever .....................................3-5
Brake pedal ....................................3-5
Fuel tank cap ..................................3-5
Fuel .................................................3-6
Catalytic converter ..........................3-7
Fuel cock ........................................3-7
Starter (choke) lever .......................3-8
Kickstarter .......................................3-9
Adjusting the shock absorber
assemblies ..................................3-9
Carrier ...........................................3-10
Luggage strap holders ..................3-10
Starting circuit cut-off system .......3-10PRE-OPERATION CHECKS............. 4-1
Pre-operation check list .................. 4-2
OPERATION AND IMPORTANT
RIDING POINTS................................. 5-1
Starting a cold engine .................... 5-1
Starting a warm engine .................. 5-2
Shifting ........................................... 5-2
Tips for reducing fuel
consumption ............................... 5-3
Engine break-in .............................. 5-3
Parking ........................................... 5-4
PERIODIC MAINTENANCE AND
MINOR REPAIR................................. 6-1
Owner’s tool kit ............................... 6-1
Periodic maintenance and
lubrication chart .......................... 6-2
Removing and installing the
cowling and panels ..................... 6-5
Checking the spark plug ................. 6-8
Engine oil ....................................... 6-9
Cleaning the air filter element ...... 6-11
Adjusting the carburetor ............... 6-12
Adjusting the engine idling
speed ........................................ 6-13
Adjusting the throttle cable free
play ........................................... 6-13
Valve clearance ............................ 6-14
Tires ............................................. 6-14
Cast wheels .................................. 6-16Adjusting the clutch lever
free play .................................... 6-17
Checking the front brake lever
free play .................................... 6-18
Adjusting the brake pedal
free play .................................... 6-18
Adjusting the rear brake light
switch ....................................... 6-19
Checking the front brake pads
and rear brake shoes ............... 6-20
Checking the front brake fluid
level .......................................... 6-20
Changing the brake fluid .............. 6-21
Drive chain slack .......................... 6-22
Cleaning and lubricating the drive
chain ......................................... 6-23
Checking and lubricating the
cables ....................................... 6-24
Checking and lubricating the
throttle grip and cable ............... 6-24
Checking and lubricating the
brake and shift pedals .............. 6-24
Checking and lubricating the
brake and clutch levers ............ 6-25
Checking and lubricating the
centerstand ............................... 6-26
Lubricating the swingarm
pivots ........................................ 6-26
Checking the front fork ................. 6-26
Checking the steering .................. 6-27
Checking the wheel bearings ....... 6-28U3D9E0E0.book Page 1 Saturday, December 25, 2004 11:35 AM

DESCRIPTION
2-3
2
EAU10430
Controls and instruments1. Clutch lever (page 3-4)
2. Left handlebar switches (page 3-3)
3. Main switch/steering lock (page 3-1)
4. Speedometer (page 3-2)
5. Fuel gauge (page 3-3)
6. Tachometer (page 3-3)
7. Right handlebar switch (page 3-3)
8. Brake lever (page 3-5)9. Throttle grip (page 6-13)
10.Fuel tank cap (page 3-5)U3D9E0E0.book Page 3 Saturday, December 25, 2004 11:35 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-4
3
EAU12400
Dimmer switch “/”
Set this switch to “” for the high
beam and to “” for the low beam.
EAU12460
Turn signal switch “/”
To signal a right-hand turn, push this
switch to “”. To signal a left-hand
turn, push this switch to “”. When re-
leased, the switch returns to the center
position. To cancel the turn signal
lights, push the switch in after it has re-
turned to the center position.
EAU12500
Horn switch “”
Press this switch to sound the horn.
EAU12710
Start switch “”
Push this switch to crank the engine
with the starter.CAUTION:
ECA10050
See page 5-1 for starting instruc-tions prior to starting the engine.
EAU31640
Clutch lever The clutch lever is located at the left
handlebar grip. To disengage the
clutch, pull the lever toward the handle-
bar grip. To engage the clutch, release
the lever. The lever should be pulled
rapidly and released slowly for smooth
clutch operation.
The clutch lever is equipped with a
clutch switch, which is part of the start-
ing circuit cut-off system. (See page
3-10.)
EAU12870
Shift pedal The shift pedal is located on the left
side of the engine and is used in com-
bination with the clutch lever when
shifting the gears of the 5-speed con-
stant-mesh transmission equipped on
this motorcycle.
1. Clutch lever
1. Shift pedal
U3D9E0E0.book Page 4 Saturday, December 25, 2004 11:35 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-9
3
EAU13660
Kickstarter If the engine fails to start by pushing the
start switch, try to start it by using the
kickstarter. To start the engine, fold out
the kickstarter lever, move it down light-
ly with your foot until the gears engage,
and then push it down smoothly but
forcefully. This model is equipped with
a primary kickstarter, allowing the en-
gine to be started in any gear if the
clutch is disengaged. However, shifting
the transmission into the neutral posi-
tion before starting is recommended.
EAU14880
Adjusting the shock absorber
assemblies Each shock absorber assembly is
equipped with a spring preload adjust-
ing ring.CAUTION:
ECA10100
Never attempt to turn an adjusting
mechanism beyond the maximum orminimum settings.
WARNING
EWA10210
Always adjust both shock absorber
assemblies equally, otherwise poor
handling and loss of stability mayresult.
Adjust the spring preload as follows.
To increase the spring preload and
thereby harden the suspension, turn
the adjusting ring on each shock ab-
sorber assembly in direction (a). To de-
crease the spring preload and thereby
soften the suspension, turn the adjust-
ing ring on each shock absorber as-
sembly in direction (b).NOTE:Align the appropriate notch in the ad-
justing ring with the position indicatoron the shock absorber.
1. Kickstarter
1. Spring preload adjusting ring
2. Position indicator
Spring preload setting:
Minimum (soft):
1
Standard:
2
Maximum (hard):
5
U3D9E0E0.book Page 9 Saturday, December 25, 2004 11:35 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-10
3
EAU15110
Carrier
WARNING
EWA10170


Do not exceed the load limit of 3
kg (6.6 lb) for the carrier.


Do not exceed the maximum
load of 200 kg (441 lb) for the ve-hicle.
EAU15190
Luggage strap holders There are four luggage strap holders
below the rear of the seat.
EAU36950
Starting circuit cut-off system The starting circuit cut-off system (com-
prising the clutch switch and the neutral
switch) prevents starting when the
transmission is in gear and the clutch
lever is not pulled.
Periodically check the operation of the
starting circuit cut-off system according
to the following procedure.
WARNING
EWA10250
If a malfunction is noted, have a
Yamaha dealer check the system be-fore riding.
1. Carrier
1. Luggage strap holder
chapter3 Page 10 Friday, January 7, 2005 4:04 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-11
3
With the engine turned off:
1. Turn the key to “ON”.
2. Shift the transmission into the neutral position.
3. Push the start switch.
Does the engine start?
The neutral switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
4. Turn the engine off.
5. Shift the transmission into gear.
6. Keep the clutch lever pulled.
7. Push the start switch.
Does the engine start?
The clutch switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
NO
NOTE:
a warmed-up engine.
YES
The system is OK. The motorcycle can be ridden.
YES
NO
This check is most reliable if performed with
U3D9E0E0.book Page 11 Saturday, December 25, 2004 11:35 AM

PRE-OPERATION CHECKS
4-2
4
EAU15603
Pre-operation check list
ITEM CHECKS PAGE
FuelCheck fuel level in fuel tank.
Refuel if necessary.
Check fuel line for leakage.3-6
Engine oilCheck oil level in engine.
If necessary, add recommended oil to specified level.
Check vehicle for oil leakage.6-9
Front brakeCheck operation.
If soft or spongy, have Yamaha dealer bleed hydraulic system.
Check brake pads for wear.
Replace if necessary.
Check fluid level in reservoir.
If necessary, add recommended brake fluid to specified level.
Check hydraulic system for leakage.6-20, 6-20
Rear brakeCheck operation.
Check pedal free play.
Adjust if necessary.6-20
ClutchCheck operation.
Lubricate cable if necessary.
Check lever free play.
Adjust if necessary.6-17
Throttle gripMake sure that operation is smooth.
Check cable free play.
If necessary, have Yamaha dealer adjust cable free play and lubricate cable and
grip housing.6-13, 6-24
Control cablesMake sure that operation is smooth.
Lubricate if necessary.6-24
Drive chainCheck chain slack.
Adjust if necessary.
Check chain condition.
Lubricate if necessary.6-22, 6-23
U3D9E0E0.book Page 2 Saturday, December 25, 2004 11:35 AM

PRE-OPERATION CHECKS
4-3
4
Wheels and tiresCheck for damage.
Check tire condition and tread depth.
Check air pressure.
Correct if necessary.6-14, 6-16
Brake and shift pedalsMake sure that operation is smooth.
Lubricate pedal pivoting points if necessary.6-24
Brake and clutch leversMake sure that operation is smooth.
Lubricate lever pivoting points if necessary.6-25
CenterstandMake sure that operation is smooth.
Lubricate pivot if necessary.6-26
Chassis fastenersMake sure that all nuts, bolts and screws are properly tightened.
Tighten if necessary.—
Instruments, lights, signals
and switchesCheck operation.
Correct if necessary.— ITEM CHECKS PAGE
U3D9E0E0.book Page 3 Saturday, December 25, 2004 11:35 AM