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21 TECHNICAL DATA 117

21.3 Carburetor

21.3.1 All 125 models

Carburetor type KEIHIN PWK 38S AG

Carburetor identification number BS5_0

Needle position 2nd position from top

Jet needle N1EF (N1EE, N1EG)

Main jet 182 (180, 185)

Idling jet 50 (48, 52)

Starting jet 85

Idle air adjusting screw

Open 2 turns

Throttle slide 7 with cut-out

21.3.2 Carburetor - basic setting for sandy surfaces (All 125 models)

Idle air adjusting screw

Open 1 turn

Idling jet 52

Jet needle N1EE

Needle position 4th position from top

Main jet 192

Info

If the engine is not running smoothly, use a smaller main jet.

Default Chapter4
- Table of Contents4
1 Means of Representation7
- Symbols Used7
- Formats Used7
2 Safety Advice8
- Use Definition - Intended Use8
- Degrees of Risk and Symbols8
- Tampering Warning8
- Safe Operation9
- Protective Clothing9
- Work Rules9
- Environment9
- Owner's Manual9
3 Important Notes10
- Guarantee, Warranty10
- Operating and Auxiliary Substances10
- Spare Parts, Accessories10
- Service10
- Figures10
- Customer Service10
4 View of Vehicle11
- View of Vehicle, Front Left (Example)11
- View of Vehicle, Rear Right (Example)12
5 Serial Numbers13
- Chassis Number13
- Type Label13
- Engine Number13
- Fork Part Number13
- Shock Absorber Article Number13
6 Controls14
- Clutch Lever14
- Hand Brake Lever14
- Throttle Grip14
- Kill Switch14
- Electric Starter Button (All XC Models)14
- Opening the Filler Cap15
- Closing the Filler Cap15
- Fuel Tap (All SX Models)16
- Fuel Tap (All XC Models)16
- Choke17
- Shift Lever17
- Kick Starter17
- Foot Brake Lever18
- Plug-In Stand (All SX Models)18
- Side Stand (All XC Models)18
7 Preparing for Use19
- Advice on First Use19
- Running in the Engine20
- Preparing the Vehicle for Difficult Riding Conditions20
- Preparing for Rides on Dry Sand20
- Preparing for Rides on Wet Sand22
- Preparing for Rides on Wet and Muddy Surfaces23
- Preparations for Riding at High Temperatures and Low Speeds23
- Preparing for Rides at Low Temperature or in Snow24
8 Riding Instructions25
- Checks and Maintenance Work When Preparing for Use25
- Starting25
- Starting off26
- Shifting, Riding26
- Braking27
- Stopping, Parking27
- Transport28
- Refueling28
9 Service Schedule29
- All SX Models29
- Service Work (as Additional Order)30
- All XC Models30
- Service Schedule30
- Service Work (as Additional Order)31
10 Tuning the Chassis32
- Checking the Basic Chassis Setting with the Rider's Weight32
- Air Suspension AER 48 (125/150 SX EU)32
- Compression Damping of the Shock Absorber33
- Adjusting the Low-Speed Compression Damping of the Shock Absorber33
- Adjusting the High-Speed Compression Damping of the Shock Absorber34
- Adjusting the Rebound Damping of the Shock Absorber35
- Measuring the Rear Wheel Sag Unloaded36
- Checking the Static Sag of the Shock Absorber37
- Checking the Riding Sag of the Shock Absorber38
- Adjusting the Spring Preload of the Shock Absorber38
- Adjusting the Riding Sag39
- Checking the Basic Setting of the Fork41
- Adjusting the Fork Air Pressure (125/150 SX EU)41
- Adjusting the Compression Damping of the Fork42
- Adjusting the Rebound Damping of the Fork43
- Handlebar Position44
- Adjusting the Handlebar Position44
11 Service Work on the Chassis46
- Raising the Motorcycle with a Lift Stand46
- Removing the Motorcycle from the Lift Stand46
- Bleeding the Fork Legs47
- Cleaning the Dust Boots of the Fork Legs47
- Removing the Fork Legs48
- Installing the Fork Legs48
- Removing the Fork Protector49
- Installing the Fork Protector49
- Removing the Lower Triple Clamp49
- Installing the Lower Triple Clamp50
- Checking the Play of the Steering Head Bearing52
- Adjusting the Steering Head Bearing Play52
- Greasing the Steering Head Bearing53
- Removing the Start Number Plate53
- Installing the Start Number Plate54
- Removing the Front Fender54
- Installing the Front Fender54
- Removing the Shock Absorber54
- Installing the Shock Absorber56
- Removing the Seat58
- Mounting the Seat58
- Removing the Air Filter Box Cover59
- Installing the Air Filter Box Cover60
- Removing the Air Filter61
- Cleaning the Air Filter and Air Filter Box61
- Installing the Air Filter62
- Securing the Air Filter Box Cover62
- Sealing the Air Filter Box63
- Disassembling the Main Silencer63
- Installing the Main Silencer64
- Changing the Glass Fiber Yarn Filling in the Main Silencer64
- Removing the Fuel Tank65
- Installing the Fuel Tank66
- Checking the Chain for Dirt68
- Cleaning the Chain68
- Checking the Chain Tension69
- Adjusting the Chain Tension69
- Checking the Chain, Rear Sprocket, Engine Sprocket, and Chain Guide70
- Checking the Frame73
- Checking the Swingarm73
- Checking the Routing of the Throttle Cable73
- Checking the Rubber Grip74
- Additionally Securing the Rubber Grip75
- Adjusting Basic Position of Clutch Lever75
- Checking/Correcting the Fluid Level of the Hydraulic Clutch75
- Changing the Hydraulic Clutch Fluid75
12 Brake System77
- Checking the Free Travel of the Hand Brake Lever77
- Adjusting the Basic Position of the Hand Brake Lever77
- Checking the Brake Discs77
- Checking the Front Brake Fluid Level78
- Adding Front Brake Fluid78
- Checking the Front Brake Linings79
- Changing the Front Brake Linings79
- Checking the Free Travel of Foot Brake Lever81
- Adjusting the Basic Position of the Foot Brake Lever81
- Checking the Rear Brake Fluid Level82
- Adding Rear Brake Fluid83
- Checking the Rear Brake Linings84
- Changing the Rear Brake Linings84
13 Wheels, Tires86
- Removing the Front Wheel86
- Installing the Front Wheel86
- Removing the Rear Wheel87
- Installing the Rear Wheel88
- Checking the Tire Condition88
- Checking the Tire Air Pressure89
- Checking the Spoke Tension89
14 Electrical System91
- Removing the Battery (All XC Models)91
- Installing the Battery (All XC Models)91
- Recharging the Battery (All XC Models)92
- Change the Main Fuse (All XC Models)93
15 Cooling System94
- Radiator Cover (All 125/150 Models)94
- Installing the Radiator Cover (All 125/150 Models)94
- Removing the Radiator Cover (All 125/150 Models)95
- Checking the Antifreeze and Coolant Level95
- Checking the Coolant Level96
- Draining the Coolant96
- Refilling with Coolant97
16 Tuning the Engine99
- Checking the Play in the Throttle Cable99
- Adjusting the Play in the Throttle Cable99
- Carburetor - Idle100
- Carburetor - Adjusting the Idle Speed100
- Ignition Curve Plug-In Connector101
- Changing the Ignition Timing Map102
- Checking the Basic Position of the Shift Lever102
- Adjusting the Basic Position of the Shift Lever103
- Engine Characteristic - Auxiliary Spring (All 250/300 Models)103
- Engine Characteristic - Setting the Auxiliary Spring (All 250/300 Models)103
17 Service Work on the Engine105
- Emptying the Carburetor Float Chamber105
- Checking the Gear Oil Level105
- Changing the Gear Oil106
- Draining the Gear Oil106
- Refilling with Gear Oil107
- Adding Gear Oil108
18 Cleaning, Care109
- Cleaning the Motorcycle109
19 Storage110
- Preparing for Use after Storage110
20 Troubleshooting111
21 Technical Data113
- Engine113
- All 125 Models113
- All 150 Models113
- Engine Tightening Torques116
- All 125/150 Models116
- All XC Models117
- Carburetor119
- All 125 Models119
- Carburetor - Basic Setting for Sandy Surfaces (All 125 Models)119
- Carburetor Tuning (All 125 Models)120
- All 150 Models121
- Carburetor - Basic Setting for Sandy Surfaces (All 150 Models)121
- Carburetor Tuning (All 150 Models)122
- Carburetor - Basic Setting for Sandy Surfaces (250 SX)123
- Carburetor Tuning (250 SX)124
- Carburetor Tuning (250 XC)125
- Carburetor Tuning (300 XC)127
- 21.3.14 General Carburetor Tuning128
- Capacities128
- Gear Oil128
- Coolant128
- Fuel128
- Chassis128
- Electrical System129
- Tires129
- Fork130
- 125/150 Sx Eu130
- 125/150 Sx Us130
- Sx Us131
- All XC Models131
- Shock Absorber132
- 125/150 Sx Eu132
- 125/150 Sx Us132
- Sx Eu133
- Sx Us133
- All XC Models134
- Chassis Tightening Torques134
22 Substances136
23 Auxiliary Substances138
24 Standards140
25 List of Abbreviations141
- Index142

Brand	KTM
Model	125 SX
Category	Motorcycle
Language	English

KTM 125 SX User Manual

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KTM 125 SX Specifications

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