2000 YAMAHA SR125 oil type

PERIODIC MAINTENANCE AND MINOR REPAIR
6-20
6
EAU00732
Inspecting the brake fluid
levelInsufficient 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 minimum level and fill
when necessary.
Observe these precautions:l
When checking the fluid level,
make sure the top of the master
cylinder is level by turning the han-
dlebars.
l
Use only the designated quality
brake fluid. Otherwise, the rubber
seals may deteriorate, causing
leakage and poor brake perfor-
mance.
NOTE:@ If DOT 4 is not available, DOT 3 can be
used. @l
Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor brake performance.
l
Be careful that water does not en-
ter the master cylinder when refill-
ing. Water will significantly lower
the boiling point of the fluid and
may result in vapor lock.
l
Brake fluid may deteriorate paint-
ed surfaces or plastic parts. Al-
ways clean up spilled fluid
immediately.
l
Have a Yamaha dealer check the
cause if the brake fluid level goes
down.
EAU00742
Brake fluid replacementThe brake fluid should be replaced only
by trained Yamaha service personnel.
Have the Yamaha dealer replace the
following components during periodic
maintenance or when they are dam-
aged or leaking:l
oil seals (every two years)
l
brake hoses (every four years)
1. Minimum level mark
Recommended brake fluid: DOT 4
E_3mw.book Page 20 Monday, February 5, 2001 9:54 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-23
6
EAU01106*
Drive chain lubricationThe 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 es-
pecially necessary when riding in dusty
areas.
The drive chain should be lubricated
every 500 km. First, remove all dirt and
mud from the chain with a brush or
cloth. Then, spray any of the many
brands of spray-type chain lubricant
between both rows of side plates and
on all center rollers.
To clean the chain thoroughly, remove
it from the motorcycle, dip it in solvent,
and clean out as much dirt as possible.
Then, take the chain out of the solvent
to dry it, and immediately lubricate it to
prevent it from rusting.
EAU02962
Cable inspection and
lubrication
EW000112
WARNING
@ Damage to the outer housing of ca-
bles may lead to internal rusting and
interfere with the cable movement.
Replace damaged cables as soon as
possible to prevent unsafe condi-
tions. @Lubricate the cables and cable ends. If
a cable does not operate smoothly, ask
a Yamaha dealer to replace it.
EAU00773
Throttle cable and grip
lubricationThe throttle twist grip assembly should
be greased at the time that the cable is
lubricated, since the grip must be re-
moved to get at the end of the throttle
cable. After removing the screws, hold
the end of the cable up in the air and
put in several drops of lubricant. With
the throttle grip disassembled, coat the
metal surface of the grip assembly with
a suitable all-purpose grease.
Recommended lubricant:
Engine oil
E_3mw.book Page 23 Monday, February 5, 2001 9:54 AM

8-1
8
EAU01038
8-SPECIFICATIONSSpecifications
Model SR125
Dimensions
Overall length 2,020 mm
Overall width 775 mm
Overall height 1,100 mm
Seat height 745 mm
Wheelbase 1,285 mm
Ground clearance 155 mm
Minimum turning radius 2,100 mm
Basic weight (with oil and full
fuel tank)
113 kg
Engine
Engine type Air-cooled 4-stroke, SOHC
Cylinder arrangement Forward-inclined single cylinder
Displacement 124 cm
3
Bore ´ Stroke 57.0 ´ 48.8 mm
Compression ratio 10:1
Starting system Electric starter
Lubrication system Wet sumpEngine oil
Ty p e
Recommended engine oil
classification API Service SE, SF, SG type or
higher
Quantity
Periodic oil change 1.0 L
With oil filter replacement 1.1 L
Total amount 1.3 L
Air filterWet type element
-20˚ -10˚ 0˚
10˚20˚ 30˚
40˚50˚C
SAE 10W/30
SAE 15W/40SAE 20W/40SAE 20W/50
SAE 10W/40
CAUTION:Be sure to use motor oils that do not contain anti-friction
modifiers. Passenger car motor oils (often labeled
“Energy Conserving”) contain anti-friction additives which
will cause clutch and/or starter clutch slippage, resulting in
reduced component life and poor engine performance.
E_3mw.book Page 1 Monday, February 5, 2001 9:54 AM

SPECIFICATIONS
8-3
8
Maximum load* 160 kg
Air pressure (cold tire)
Up to 90 kg load*
Front 175 kPa (1.75 kg/cm
2, 1.75 bar)
Rear 200 kPa (2.00 kg/cm2, 2.00 bar)
90 kg load ~ maximum load*
Front 175 kPa (1.75 kg/cm2, 1.75 bar)
Rear 225 kPa (2.25 kg/cm2, 2.25 bar)
*Load is total weight of cargo, rider, passenger and accessories
Wheels
Front
Type Spoke
Size 17 ´ 1.60
Rear
Type Spoke
Size 16 ´ 1.85
Brakes
Front
Type Single disc brake
Operation Right hand operation
Fluid DOT 4 or DOT 3
Rear
Type Drum brake
Operation Right foot operationSuspension
Front
Ty p e Te l e s c o p i c f o r k
Rear
Type Swingarm
Shock absorbers
Front Coil spring / oil damper
Rear Coil spring / oil damper
Wheel travel
Front 120 mm
Rear 76 mm
Electrical system
Ignition system C.D.I.
Charging system
Type C.D.I. magneto
Standard output 14 V, 9 A @ 5,000 r/min
Battery
Type 12N7-3B-1
Voltage, capacity 12 V, 7 AH
Headlight typeQuartz bulb (halogen)
E_3mw.book Page 3 Monday, February 5, 2001 9:54 AM