2000 YAMAHA SR125 fuel cap

EAU00009
TABLE OF CONTENTS
GIVE SAFETY THE RIGHT OF WAY ..................1-1
DESCRIPTION ....................................................2-1
Left view ............................................................. 2-1
Right view...........................................................2-2
Controls/Instruments ..........................................2-3
INSTRUMENT AND CONTROL FUNCTIONS ....3-1
Main switch/steering lock ................................... 3-1
Indicator lights ....................................................3-2
Speedometer......................................................3-2
Handlebar switches ............................................3-2
Clutch lever ........................................................3-4
Shift pedal ..........................................................3-4
Front brake lever ................................................ 3-4
Rear brake pedal................................................ 3-5
Fuel tank cap......................................................3-5
Fuel ....................................................................3-6
Fuel cock ............................................................3-6
Starter (choke) knob...........................................3-7
Seat ....................................................................3-8
Helmet holder .....................................................3-8
Rear shock absorber adjustment .......................3-9
Sidestand ...........................................................3-9
Sidestand/clutch switch operation check ......... 3-10PRE-OPERATION CHECKS ...............................4-1
Pre-operation check list......................................4-1
OPERATION AND IMPORTANT RIDING
POINTS................................................................5-1
Starting the engine .............................................5-1
Starting a warm engine ......................................5-3
Shifting ...............................................................5-4
Recommended shift points
(for Switzerland only) ......................................5-4
Tips for reducing fuel consumption ....................5-5
Engine break-in ..................................................5-5
Parking ...............................................................5-6
PERIODIC MAINTENANCE AND MINOR
REPAIR................................................................6-1
Tool kit................................................................6-1
Periodic maintenance and lubrication chart .......6-2
Panel removal and installation ...........................6-5
Panels A and B ..................................................6-5
Spark plug ..........................................................6-6
Engine oil ...........................................................6-8
Air filter .............................................................6-10
Carburetor adjustment .....................................6-11
Idle speed adjustment ......................................6-11
123
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2-1
2
EAU00026
2-DESCRIPTIONLeft view1. Fuel tank cap (page 3-5)
2. Fuel cock (page 3-6)
3. Helmet holder (page 3-8)
4. Fuse box (page 6-28)5. Sidestand (page 3-9)
6. Starter (choke) knob (page 3-7)
7. Shift pedal (page 3-4)
E_3mw.book Page 1 Monday, February 5, 2001 9:54 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-5
3
EAU00162
Rear brake pedalThe rear brake pedal is on the right
side of the motorcycle. Press down on
the brake pedal to apply the rear brake.
EAU00167
Fuel tank capTo open
Insert the key and turn it 1/4 turn clock-
wise. The lock will be released and the
cap can be opened.
To close
Push the tank cap into position with the
key inserted. To remove the key, turn it
counterclockwise to the original posi-
tion.
NOTE:@ This tank cap cannot be closed unless
the key is in the lock. The key cannot
be removed if the cap is not locked
properly. @
EW000023
WARNING
@ Be sure the cap is properly installed
and locked in place before riding the
motorcycle. @
1. Rear brake pedal
1. Open
E_3mw.book Page 5 Monday, February 5, 2001 9:54 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-6
3
EAU01183
FuelMake sure there is sufficient fuel in the
tank. Fill the fuel tank to the bottom of
the filler tube as shown in the illustra-
tion.
EW000130
WARNING
@ Do not overfill the fuel tank. Avoid
spilling fuel on the hot engine. Do
not fill the fuel tank above the bot-
tom of the filler tube or it may over-
flow when the fuel heats up later and
expands. @
EAU00185
CAUTION:@ Always wipe off spilled fuel immedi-
ately with a dry and clean soft cloth.
Fuel may deteriorate painted surfac-
es or plastic parts. @
EAU00191
NOTE:@ If knocking or pinging occurs, use a dif-
ferent brand of gasoline or higher oc-
tane grade. @
EAU03050
Fuel cockThe fuel cock supplies fuel from the
tank to the carburetor while filtering it
also.
The fuel cock has three positions:
OFF
With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not run-
ning.
1. Filler tube
2. Fuel level
Recommended fuel:
Regular unleaded gasoline with a
research octane number of 91 or
higher.
Fuel tank capacity:
Total:
10.0 L
Reserve:
1.6 L
1. Arrow mark positioned over “OFF”OFF: closed position
E_3mw.book Page 6 Monday, February 5, 2001 9:54 AM

SPECIFICATIONS
8-2
8
Fuel
Type Regular unleaded gasoline
Fuel tank capacity 10.0 L
Fuel reserve amount 1.6 L
Carburetor
Type ´ quantity Y24P ´ 1
Manufacturer TEIKEI
Spark plug
Manufacturer/Type NGK / DR8EA
Gap 0.6 ~ 0.7 mm
Clutch typeWet, multiple-disc
Transmission
Primary reduction system Spur gear
Primary reduction ratio 3.318
Secondary reduction system Chain drive
Secondary reduction ratio 3.500
Number of drive chain
sprocket teeth (rear/front) 49/14
Transmission type Constant mesh 5-speed
Operation Left foot operationGear ratio
1st 2.250
2nd 1.476
3rd 1.125
4th 0.926
5th 0.793
Chassis
Frame type Diamond
Caster angle 26°45¢
Trail 90 mm
Tires
Front
Type With tube
Size 3.00-17 45P
Manufacturer/
model Inoue / 8F
Rear
Type With tube
Size 3.50-16 52P
Manufacturer/
model Inoue / 8RA
E_3mw.book Page 2 Monday, February 5, 2001 9:54 AM