2003 YAMAHA YBR125 oil type

6-8
e. Fill engine with oil. Install the oil filter cap and tighten.
NOTE:
Recommended engine oil classification; API Service “SH”
type or equivalent
Do not put in any chemical additives. Engine oil also
lubricates the clutch and additives could cause clutch
slippage.
Be sure no foreign material enters the crankcase. f. Start the engine and warm up for a few minutes.While warming up, check for oil leakage. If oil
leakage is found, stop the engine immediately, and
check for the cause.
g. Stop the engine and check the oil level.
After replacing the engine oil, be sure to check the oil
pressure.
Oil quantity: Total amount:
1.2 L ( 0.264 Imp gal, 0.317 US gal)
Periodic oil change:
1.0 L ( 0.220 Imp gal, 0.264 US gal)
Recommended oil:
Yamalube 4
CAUTION:
CAUTION:
CAUTION:
6-8
e. Fill engine with oil. Install the oil filter cap and tighten.
NOTE:
Recommended engine oil classification; API Service “SH”
type or equivalent
Do not put in any chemical additives. Engine oil also
lubricates the clutch and additives could cause clutch
slippage.
Be sure no foreign material enters the crankcase. f. Start the engine and warm up for a few minutes.While warming up, check for oil leakage. If oil
leakage is found, stop the engine immediately, and
check for the cause.
g. Stop the engine and check the oil level.
After replacing the engine oil, be sure to check the oil
pressure.
Oil quantity: Total amount:
1.2 L ( 0.264 Imp gal, 0.317 US gal)
Periodic oil change:
1.0 L ( 0.220 Imp gal, 0.264 US gal)
Recommended oil:
Yamalube 4
CAUTION:
CAUTION:
CAUTION:

!$
Inspecting the brake fluid level
Insufficient brake fluid may let air enter the brake system,
possibly causing the brakes to become ineffective. Before
riding, check that the brake fluid is above the lower level
and replenish when necessary. Observe these precautions:
1. When checking the fluid level, make sure the top of the
master cylinder is level by turning the handlebars.
2. Use only the designated quality brake fluid. Otherwise,
the rubber seals may deteriorate, causing leakage and
poor brake performance.
Recommended brake fluid:
DOT #4
NOTE:
If DOT #4 is not available, #3 can be used.
1. Lower level
3. Refill with the same type of brake fluid. Mixing fluids
may result in a harmful reaction and lead to poor brake
performance.
4. Be careful that water does not enter the master cylinder
when refilling. Water will significantly lower the boiling
point of the fluid and may result in vapor lock.
5. Brake fluid may deteriorate painted surfaces or plastic
parts. Always clean up spilled fluid immediately.
6. Have a Yamaha dealer check the cause if the brake
fluid level goes down.
!$
Inspecting the brake fluid level
Insufficient brake fluid may let air enter the brake system,
possibly causing the brakes to become ineffective. Before
riding, check that the brake fluid is above the lower level
and replenish when necessary. Observe these precautions:
1. When checking the fluid level, make sure the top of the
master cylinder is level by turning the handlebars.
2. Use only the designated quality brake fluid. Otherwise,
the rubber seals may deteriorate, causing leakage and
poor brake performance.
Recommended brake fluid:
DOT #4
NOTE:
If DOT #4 is not available, #3 can be used.
1. Lower level
3. Refill with the same type of brake fluid. Mixing fluids
may result in a harmful reaction and lead to poor brake
performance.
4. Be careful that water does not enter the master cylinder
when refilling. Water will significantly lower the boiling
point of the fluid and may result in vapor lock.
5. Brake fluid may deteriorate painted surfaces or plastic
parts. Always clean up spilled fluid immediately.
6. Have a Yamaha dealer check the cause if the brake
fluid level goes down.

6-23 Drive chain lubrication
The chain consists of many parts which work with each
other. If the chain is not maintained properly, it will wear out
quickly. Therefore, the chain must be serviced regularly.
This service is especially necessary when riding in dusty
areas.
1. Use Yamaha Chain and Cable Lube or any
brands of spray-type chain lubricant. First,
remove all dirt and mud from the chain with a
brush or cloth, then spray lubricant between both
rows of side plates and on all center rollers. The
chain should be lubricated every 500 km (300 mi).
2. To clean the chain, remove it from the machine,
dip it in solvent, and clean out as much dirt as
possible. Take the chain out of the solvent and
dry it. Immediately lubricate the chain to prevent
it from rusting.Cable inspection and lubrication
Damage to the outer housing of cables may allow
internal rusting and cause interfere with cable
movement. Replace damaged cables as soon as
possible to prevent unsafe conditions.
Lubricate the inner cable and the cable end. If it does not
operate smoothly, ask a Yamaha dealer to replace them.
RECOMMENDED LUBRICANT:
Engine oil SAE 20W50
WARNING:
6-23 Drive chain lubrication
The chain consists of many parts which work with each
other. If the chain is not maintained properly, it will wear out
quickly. Therefore, the chain must be serviced regularly.
This service is especially necessary when riding in dusty
areas.
1. Use Yamaha Chain and Cable Lube or any
brands of spray-type chain lubricant. First,
remove all dirt and mud from the chain with a
brush or cloth, then spray lubricant between both
rows of side plates and on all center rollers. The
chain should be lubricated every 500 km (300 mi).
2. To clean the chain, remove it from the machine,
dip it in solvent, and clean out as much dirt as
possible. Take the chain out of the solvent and
dry it. Immediately lubricate the chain to prevent
it from rusting.Cable inspection and lubrication
Damage to the outer housing of cables may allow
internal rusting and cause interfere with cable
movement. Replace damaged cables as soon as
possible to prevent unsafe conditions.
Lubricate the inner cable and the cable end. If it does not
operate smoothly, ask a Yamaha dealer to replace them.
RECOMMENDED LUBRICANT:
Engine oil SAE 20W50
WARNING:

8-1
SPECIFICATIONS
MODEL YBR 125 ED
Dimension: Overall length 1,980 mm ( 78 in)
Overall width 745 mm ( 29 in)
Overall height 1,050 mm ( 41 in)
Seat height 780 mm ( 31 in)
Wheel base 1,290 mm ( 51 in)
Minimum ground clearance 175 mm ( 7 in)
Basic weight: 108 Kg ( 238 lb)
With oil and without fuel: 119 Kg ( 262 lb)
Minimum turning radius: 1,750 mm ( 70 in)
Engine: Type Air cooled, 4-stroke gasoline, SOHC
Cylinder arrangement Single cylinder, Forward inclined
Displacement 123.7 cm
3
Bore x Stroke 54 x 54 mm ( 2.13 x 2.13 in)
Compression rate 10.0 : 1
Starting system Electric starter
Lubrication system Wet sump
8-1
SPECIFICATIONS
MODEL YBR 125 ED
Dimension: Overall length 1,980 mm ( 78 in)
Overall width 745 mm ( 29 in)
Overall height 1,050 mm ( 41 in)
Seat height 780 mm ( 31 in)
Wheel base 1,290 mm ( 51 in)
Minimum ground clearance 175 mm ( 7 in)
Basic weight: 108 Kg ( 238 lb)
With oil and without fuel: 119 Kg ( 262 lb)
Minimum turning radius: 1,750 mm ( 70 in)
Engine: Type Air cooled, 4-stroke gasoline, SOHC
Cylinder arrangement Single cylinder, Forward inclined
Displacement 123.7 cm
3
Bore x Stroke 54 x 54 mm ( 2.13 x 2.13 in)
Compression rate 10.0 : 1
Starting system Electric starter
Lubrication system Wet sump

MODEL YBR 125ED
Engine oil: Type Yamalube 4 or SAE 20W50 type SH
Capacity: Periodic oil change 1.0 L ( 0.220 Imp galt, 0.264 US gal)
Total amount 1.2 L ( 0.264 Imp gal, 0.317 US gal)
Air filter: Wet type element
Fuel: Type Regular unleaded gasoline
Tank capacity 13 L ( 2.860 Imp gal, 3.434 US gal)
Reserve amount 1.7 L ( 0.374 Imp gal, 0.450 US gal)
Carburetor: Type/manufacturer VM 20 / MIKUNI
Spark plug: Type/manufacturer CR7HSA / NGK or U22FSR-U / DENSO
Gap 0.7 mm (0.028 in)
Clutch type: Wet, multi-disc
8-2
MODEL YBR 125ED
Engine oil: Type Yamalube 4 or SAE 20W50 type SH
Capacity: Periodic oil change 1.0 L ( 0.220 Imp galt, 0.264 US gal)
Total amount 1.2 L ( 0.264 Imp gal, 0.317 US gal)
Air filter: Wet type element
Fuel: Type Regular unleaded gasoline
Tank capacity 13 L ( 2.860 Imp gal, 3.434 US gal)
Reserve amount 1.7 L ( 0.374 Imp gal, 0.450 US gal)
Carburetor: Type/manufacturer VM 20 / MIKUNI
Spark plug: Type/manufacturer CR7HSA / NGK or U22FSR-U / DENSO
Gap 0.7 mm (0.028 in)
Clutch type: Wet, multi-disc
8-2

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