2003 YAMAHA YBR125 ABS

CONTENTS
DESCRIPTION............................................................. 1-1
MACHINE IDENTIFICATION ....................................... 2-1
Vehicle identification number ................................. 2-1
Engine serial number ............................................ 2-1
CONTROL FUNCTIONS .............................................. 3-1
Main switch ............................................................ 3-1
Indicator lights ........................................................ 3-2
Speedometer .......................................................... 3-3
Fuel gauge ............................................................. 3-3
Handlebar switches over left .................................. 3-4
Handlebar switches over right .............................. 3-5
Clutch lever .......................... .................................. 3-6
Shift pedal ............................................................. 3-6
Front brake lever ................................................... 3-7
Rear brake pedal ................................................... 3-7
Fuel tank cap ......................................................... 3-8
Fuel cock ............................................................... 3-9
Starter lever ......................................................... 3-10
Steering lock ....................... ................................ 3-11
Seat ...................................................................... 3-12
Side covers ......................................................... 3-13
Rear shock absorber adjustment........................ 3-14
Clutch switch operation check ............................ 3-15
XIPRE-OPERATION
CHECKS........................................ 4-1
Brakes ................................................................... 4-3
Brake fluid leakage ................................................ 4-4
Engine oil ................................................................ 4-4
Tires ........................................................................\
4-5
Clutch ..................................................................... 4-8
Throttle grip ............................ ................................ 4-8
Fitting/Fasteners .................................................... 4-8
Switches ................................................................ 4-8
Wheels ......................................................... 4-8
Fuel ........................................................... 4-9
OPERATION AND IMPORT ANT RIDING POINTS....... 5-1
Starting a cold engine .................................................. 5-2
Starting a warm engine ................................................ 5-4
Warming up the engine ................................................ 5-4
Shifting ........................................................................\
.. 5-5
Engine Break-in ............................................................ 5-6
Parking ........................................................................\
.. 5-7
CONTENTS
DESCRIPTION ............................................................. 1-1
MACHINE IDENTIFICATION ....................................... 2-1
Vehicle identification number ................................. 2-1
Engine serial number ............................................ 2-1
CONTROL FUNCTIONS .............................................. 3-1
Main switch ............................................................ 3-1
Indicator lights ........................................................ 3-2
Speedometer .......................................................... 3-3
Fuel gauge ............................................................. 3-3
Handlebar switches over left .................................. 3-4
Handlebar switches over right .............................. 3-5
Clutch lever .......................... .................................. 3-6
Shift pedal ............................................................. 3-6
Front brake lever ................................................... 3-7
Rear brake pedal ................................................... 3-7
Fuel tank cap ......................................................... 3-8
Fuel cock ............................................................... 3-9
Starter lever ......................................................... 3-10
Steering lock ....................... ................................ 3-11
Seat ...................................................................... 3-12
Side covers ......................................................... 3-13
Rear shock absorber adjustment........................ 3-14
Clutch switch operation check ............................ 3-15
XIPRE-OPERATION
CHECKS........................................ 4-1
Brakes ................................................................... 4-3
Brake fluid leakage ................................................ 4-4
Engine oil ................................................................ 4-4
Tires ........................................................................\
4-5
Clutch ..................................................................... 4-8
Throttle grip ............................ ................................ 4-8
Fitting/Fasteners .................................................... 4-8
Switches ................................................................ 4-8
Wheels ......................................................... 4-8
Fuel ........................................................... 4-9
OPERATION AND IMPORT ANT RIDING POINTS....... 5-1
Starting a cold engine .................................................. 5-2
Starting a warm engine ................................................ 5-4
Warming up the engine ................................................ 5-4
Shifting ........................................................................\
.. 5-5
Engine Break-in ............................................................ 5-6
Parking ........................................................................\
.. 5-7

1-1
DESCRIPTION
01. Fuel cock
02. Starter lever
03. Battery
04. Fusible
05. Tool kit
06. Shift Pedal
07. Shock absorber
08. Air filter
09. Dispstick
10. Rear brake pedal
11. Clutch lever
12. Handlebar switches over right
13. Speedometer
14. Main switch
15. Fuel gauge
16. Front brake lever
17. Throttle
18. Handlebar switches over left
19. Fuel tank cap
1-1
DESCRIPTION
01. Fuel cock
02. Starter lever
03. Battery
04. Fusible
05. Tool kit
06. Shift Pedal
07. Shock absorber
08. Air filter
09. Dispstick
10. Rear brake pedal
11. Clutch lever
12. Handlebar switches over right
13. Speedometer
14. Main switch
15. Fuel gauge
16. Front brake lever
17. Throttle
18. Handlebar switches over left
19. Fuel tank cap

 Rear shock absorber adjustment
1. Spring preload adjusting ring 2.Position indicator
Each shock absorber is equipped with a spring preload
adjusting ring. Adjust spring preload as follows.
Turn the adjusting ring in direction  to increase spring
preload and in direction  to decrease spring preload. Make
sure that the appropriate notch in the adjusting ring is aligned
with the position indicator on the rear shock absorber.
Always adjust each shock absorber to the same setting.
Uneven adjustment can cause poor handling and loss of
stability.
1234
56
7 Adjusting
position
SoftStandard
Hard
CAUTION:

 Rear shock absorber adjustment
1. Spring preload adjusting ring 2.Position indicator
Each shock absorber is equipped with a spring preload
adjusting ring. Adjust spring preload as follows.
Turn the adjusting ring in direction  to increase spring
preload and in direction  to decrease spring preload. Make
sure that the appropriate notch in the adjusting ring is aligned
with the position indicator on the rear shock absorber.
Always adjust each shock absorber to the same setting.
Uneven adjustment can cause poor handling and loss of
stability.
1234
56
7 Adjusting
position
SoftStandard
Hard
CAUTION:

4-7 After extensive tests, the tires listed below have been
approved by Yanaha for this model. The front and rear
tires should always be by the same manufacturer and
of the same design. No guarantee concerning handling
characteristics can be given if a tire combination other
than one approved by Yamaha is used on this
motorcycle.
Front
Rear
Size Manufacturer
Type
Minimum tire tread depth
(from and rear)0,8 mm (0.0315 in) 2.75-18 PIRELLI
42P MT 39
90/90-18 PIRELLI
57P MT 15
1. It is dangerous to ride with a worn-out tire. When
the tire tread begin to show signs of wear, replace
the tire immediately. Brakes, tires and related wheel
parts should be left to a Yamaha dealer.
2. Patching a punctured tube is not recommended. If
it is absolutely necessary to do so, use great care
and replace the tube as soon as possible with a
good quality replacement.
WARNING:WARNING:
4-7 After extensive tests, the tires listed below have been
approved by Yanaha for this model. The front and rear
tires should always be by the same manufacturer and
of the same design. No guarantee concerning handling
characteristics can be given if a tire combination other
than one approved by Yamaha is used on this
motorcycle.
Front
Rear
Size Manufacturer
Type
Minimum tire tread depth
(from and rear)0,8 mm (0.0315 in) 2.75-18 PIRELLI
42P MT 39
90/90-18 PIRELLI
57P MT 15
1. It is dangerous to ride with a worn-out tire. When
the tire tread begin to show signs of wear, replace
the tire immediately. Brakes, tires and related wheel
parts should be left to a Yamaha dealer.
2. Patching a punctured tube is not recommended. If
it is absolutely necessary to do so, use great care
and replace the tube as soon as possible with a
good quality replacement.
WARNING:WARNING:

6-4
*
**
***
: It is recommended that these items be serviced by a Yamaha dealer.
: Molybdenum disulfide grease.
: Lithium soap based grease.
NOTE:
Brake fluid replacement:
1. When disassembling the master cylinder or caliper cylinder, replace the brake fluid. Normally check the brake fluid level and add fluid as required.
2. On the inner parts of the master cylinder and caliper cylinder, replace the oil seals every two years.
3. Replace the brake hoses every four years, or if cracked or damaged.
ITEM
Front forks*
Centerstand and
sidestand
Control cables: throttle /
clutch / front brake Rear shock absorber*
Drive chain
Fittings / fasteners
Check operation / oil leakage.
Check operation, looseness.
Adujst / Check operation
Lubricate every 12,000 Km.
Check chain slack / lubricate, adjust if necessary.
Check looseness. REMARKS1,000KM
Lights and flashers
Nuts and bolts
Motorcycle Aspect
Check operation.
Check tighten.
General Check
EVERY
3,000KM
OR EVERY3,000KM
Check operation / oil leakage.
Every 500 Km
6-4
*
**
***
: It is recommended that these items be serviced by a Yamaha dealer.
: Molybdenum disulfide grease.
: Lithium soap based grease.
NOTE:
Brake fluid replacement:
1. When disassembling the master cylinder or caliper cylinder, replace the brake fluid. Normally check the brake fluid level and add fluid as required.
2. On the inner parts of the master cylinder and caliper cylinder, replace the oil seals every two years.
3. Replace the brake hoses every four years, or if cracked or damaged.
ITEM
Front forks*
Centerstand and
sidestand
Control cables: throttle /
clutch / front brake Rear shock absorber*
Drive chain
Fittings / fasteners
Check operation / oil leakage.
Check operation, looseness.
Adujst / Check operation
Lubricate every 12,000 Km.
Check chain slack / lubricate, adjust if necessary.
Check looseness. REMARKS1,000KM
Lights and flashers
Nuts and bolts
Motorcycle Aspect
Check operation.
Check tighten.
General Check
EVERY
3,000KM
OR EVERY3,000KM
Check operation / oil leakage.
Every 500 Km

7-1
CLEANING AND STORAGE
A. CLEANING
Frequent, thorough cleaning of your motorcycle will not only
enhance its appearance but will improve its general
performance and extend the useful life of many components.
1. Before cleaning the motorcycle:
a. Block off the end of the exhaust pipe to prevent water entry; a plastic bag and strong rubber band may be
used.
b. Make sure the spark plug and all filler caps are properly
installed.
2. If the engine case is excessively greasy, apply degreaser with a paint brush. Do not apply degreaser
to the chain, sprockets, or wheel axles.
3. Rinse the dirt and degreaser off with a garden hose, Use only enough pressure to do the job.
Excessive hose pressure may cause water seepage and
deterioration of wheel bearings, front fork, brakes,
transmission seals and electrical parts. Many expensive repair bills have resulted from improper
high pressure detergent applications such as those
available in coin-operated car washers.
4. Once the majority of the dirt has been hosed off, wash
all surfaces with warm water and mild, detergent-type
soap. An old toothbrush or bottle brush is handy for
hard-to-get-at places.
5. Rinse the motorcycle off immediately with clean water
and dry all surfaces with a chamois, clean towel, or
soft absorbent cloth.
6. Dry the chain and lubricate it to prevent rust.
7. Clean the seat with a vinyl upholstery cleaner to keep the cover pliable and glossy.
8. Automotive-type wax may be applied to all painted and
chrome-plated surfaces. Avoid combination cleaner-
waxes. Many contain abrasives which may mar the paint
or protective finish. When finished, start the engine and
let it idle for several minutes.
CAUTION:
CAUTION:
7-1
CLEANING AND STORAGE
A. CLEANING
Frequent, thorough cleaning of your motorcycle will not only
enhance its appearance but will improve its general
performance and extend the useful life of many components.
1. Before cleaning the motorcycle:
a. Block off the end of the exhaust pipe to prevent water entry; a plastic bag and strong rubber band may be
used.
b. Make sure the spark plug and all filler caps are properly
installed.
2. If the engine case is excessively greasy, apply degreaser with a paint brush. Do not apply degreaser
to the chain, sprockets, or wheel axles.
3. Rinse the dirt and degreaser off with a garden hose, Use only enough pressure to do the job.
Excessive hose pressure may cause water seepage and
deterioration of wheel bearings, front fork, brakes,
transmission seals and electrical parts. Many expensive repair bills have resulted from improper
high pressure detergent applications such as those
available in coin-operated car washers.
4. Once the majority of the dirt has been hosed off, wash
all surfaces with warm water and mild, detergent-type
soap. An old toothbrush or bottle brush is handy for
hard-to-get-at places.
5. Rinse the motorcycle off immediately with clean water
and dry all surfaces with a chamois, clean towel, or
soft absorbent cloth.
6. Dry the chain and lubricate it to prevent rust.
7. Clean the seat with a vinyl upholstery cleaner to keep the cover pliable and glossy.
8. Automotive-type wax may be applied to all painted and
chrome-plated surfaces. Avoid combination cleaner-
waxes. Many contain abrasives which may mar the paint
or protective finish. When finished, start the engine and
let it idle for several minutes.
CAUTION:
CAUTION:

8-4
MODEL YBR 125ED
Brakes:
Front brake type Single, Disc brake
Operation Right hand operation
Rear brake type Drum brake
Operation Right foot operation
Suspension:
Front Telescopic fork
Rear Swingarm (New monocross suspension)
Shock absorber:
Front Coil spring, Oil damper
Rear Gas, Coil spring, Oil damper
Front 120 mm ( 5.0 in)
Rear 105 mm ( 4.0 in)
Electrical:
Ignition system CDI
Generator system AC Magneto generator
Battery type / capacity 12N 5.5-3B / 12V 5.5 Ah
8-4
MODEL YBR 125ED
Brakes:
Front brake type Single, Disc brake
Operation Right hand operation
Rear brake type Drum brake
Operation Right foot operation
Suspension:
Front Telescopic fork
Rear Swingarm (New monocross suspension)
Shock absorber:
Front Coil spring, Oil damper
Rear Gas, Coil spring, Oil damper
Front 120 mm ( 5.0 in)
Rear 105 mm ( 4.0 in)
Electrical:
Ignition system CDI
Generator system AC Magneto generator
Battery type / capacity 12N 5.5-3B / 12V 5.5 Ah