2014 YAMAHA YBR125 oil change

PERIODIC MAINTENANCE AND ADJUSTMENT
6-6
6
EAU18661
TIPThe air filter needs more frequent service if you are riding in unusually wet or dusty areas.
 Hydraulic brake service
• Regularly check and, if necessary, correct the brake fluid level.
• Every two years replace the internal components of the brake master cylinder and caliper, and change the brake fluid.
• Replace the brake hoses every four years and if cracked or damaged.20 *Shock a
bsor ber as-
sem blies • Check operation and shock ab-
sorbers for oil leakage. √√√√
21 En gine oil • Change.
• Check oil level and vehicle for oil
leakage. √√√√√√
22 *Front an
d rear
b rake switches • Check operation.
√√√√√√
23 Movin
g parts an d
ca bles • Lubricate.
√√√√√
24 *Throttle g rip • Check operation.
• Check throttle grip free play, and
adjust if necessary.
• Lubricate cable and grip housing. √√√√√
25 *Li
ghts, si gnals an d
switches • Check operation.
• Adjust headlight beam.
√√√√√√
NO. ITEM CHECK OR MAINTENANCE JOB
ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 6000 km
(3500 mi) 12000 km
(7000 mi) 18000 km
(10500 mi) 24000 km
(14000 mi)
U51DE1E0.book Page 6 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-10
6
EAU37175
Engine oilThe engine oil level should be checked
before each ride. In addition, the oil
must be changed at the intervals spec-
ified in the periodic maintenance and
lubrication chart.
To check the en gine oil level
1. Place the vehicle on the center- stand. A slight tilt to the side can
result in a false reading.
2. Start the engine, warm it up for several minutes, and then turn it
off.
3. Wait a few minutes until the oil set- tles, remove the engine oil filler
cap, wipe the engine oil dipstick
clean, insert it back into the oil fill-
er hole (without screwing it in), and
then remove it again to check the
oil level.
TIPThe engine oil should be between the
minimum and maximum level marks.
4. If the engine oil is at or below theminimum level mark, add suffi-
cient oil of the recommended type
to raise it to the correct level.
5. Insert the dipstick into the oil filler hole, and then tighten the oil filler
cap.
To chan ge the en gine oil
1. Start the engine, warm it up for several minutes, and then turn it
off.
2. Place an oil pan under the engine to collect the used oil.
3. Remove the engine oil filler cap, the engine oil drain bolt and its
gasket to drain the oil from the
crankcase.
1. Engine oil filler cap
1. Engine oil dipstick
2. Maximum level mark
3. Minimum level mark
U51DE1E0.book Page 10 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
64. Install the engine oil drain bolt and
its new gasket, and then tighten
the bolt to the specified torque.
5. Refill with the specified amount of the recommended engine oil, and
then install and tighten the oil filler
cap.
NOTICE
ECA11621
In or der to prevent clutch slip-
pa ge (since the en gine oil also
lu bricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a hi gh-
er quality than specifie d. In
a ddition, do not use oils la beled
“ENERGY CONSERVING II” or
hi gher.
 Make sure that no forei gn mate-
rial enters the crankcase.6. Start the engine, and then let it idle for several minutes while checking
it for oil leakage. If oil is leaking,
immediately turn the engine off
and check for the cause.
7. Turn the engine off, wait a few mi- nutes until the oil settles, and then
check the oil level and correct it if
necessary.
EAU37124
Cleanin g the air filter elementThe air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean or, if necessary, replace the air
filter element more frequently if you are
riding in unusually wet or dusty areas.
1. Remove panel A. (See page 6-7.)
2. Remove the air filter case cover by removing the screws.
3. Remove the air filter element.
1. Engine oil drain bolt
2. Gasket
3. Oil panTi ghtenin g torque:
Engine oil drain bolt:
20 Nm (2.0 m·kgf, 14 ft·lbf)
Recommended engine oil: See page 8-1.
Oil change quantity: 1.00 L (1.06 US qt, 0.88 Imp.qt)3
2
1
1. Screw
2. Air filter case cover
U51DE1E0.book Page 11 Thursday, August 29, 2013 4:41 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-21
6As the brake pads wear, it is normal for
the brake fluid level to gradually go
down. A low brake fluid level may indi-
cate worn brake pads and/or brake
system leakage; therefore, be sure to
check the brake pads for wear and the
brake system for leakage. If the brake
fluid level goes down suddenly, have a
Yamaha dealer check the cause before further riding.
EAU22723
Chan gin g the brake flui dHave a Yamaha dealer change the
brake fluid at the intervals specified in
the periodic maintenance and lubrica-
tion chart. In addition, have the oil seals
of the brake master cylinder and cali-
per as well as the brake hose replaced
at the intervals listed below or whenev-
er they are damaged or leaking.
 Oil seals: Replace every two
years.
 Brake hose: Replace every four
years.
EAU22762
Drive chain slackThe drive chain slack should be
checked before each ride and adjusted
if necessary.
EAU22795
To check the drive chain slack
1. Place the motorcycle on the cen- terstand.
2. Shift the transmission into the neutral position.
3. Measure the drive chain slack as shown.
4. If the drive chain slack is incorrect, adjust it as follows.1. Drive chain slackDrive chain slack:20.0–30.0 mm (0.79–1.18 in)
U51DE1E0.book Page 21 Thursday, August 29, 2013 4:41 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:1985 mm (78.1 in)
Overall width:
745 mm (29.3 in)
Overall height: 1100 mm (43.3 in)
Seat height: 780 mm (30.7 in)
Wheelbase:
1290 mm (50.8 in)
Ground clearance: 160 mm (6.30 in)
Minimum turning radius: 2080 mm (81.9 in)Wei ght:Curb weight:
126 kg (278 lb)Engine:Engine type:
Air cooled 4-stroke, SOHC
Cylinder arrangement: Single cylinder
Displacement: 124 cm³
Bore × stroke:
54.0 × 54.0 mm (2.13 × 2.13 in)
Compression ratio: 10.00 : 1
Starting system: Electric starter and kickstarter
Lubrication system:
Wet sump
Engine oil:Recommended brand:
YAMALUBE
Type:
SAE 10W-30, 10W-40, 10W-50, 15W-40,
20W-40 or 20W-50
Recommended engine oil grade: API service SG type or higher, JASO
standard MA
Engine oil quantity:
Periodic oil change: 1.00 L (1.06 US qt, 0.88 Imp.qt)Air filter:Air filter element:Dry elementFuel:Recommended fuel:
Regular unleaded gasoline (Gasohol (E10)
acceptable)
Fuel tank capacity:
13.0 L (3.43 US gal, 2.86 Imp.gal)
Fuel reserve amount: 3.4 L (0.90 US gal, 0.75 Imp.gal)
Fuel injection:Throttle body:ID mark: 51D1 00Spark plu g(s):Manufacturer/model:
NGK/CR6HSA
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Wet, multiple-discTransmission:Primary reduction ratio:3.400 (68/20)
Final drive:
Chain
Secondary reduction ratio: 3.214 (45/14)
Transmission type: Constant mesh 5-speed
Operation:
Left foot operation
Gear ratio: 1st:
2.643 (37/14)
2nd: 1.778 (32/18)
3rd: 1.316 (25/19)
4th:
1.045 (23/22)
5th: 0.875 (21/24)
–20 –10 0 1020 30 40 50 C
10 30 50 70 90 110
0 130 F
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50
U51DE1E0.book Page 1 Thursday, August 29, 2013 4:41 PM