KTM 250 SX 2019 User Manual

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TUNING THE CHASSIS 10

Finishing work

– Mount the handlebar cushion.

Default Chapter4
- Table of Contents4
1 Means of Representation 17
- Symbols Used7
- Formats Used7
2 Safety Advice8
- Use Definition - Intended Use8
- Misuse8
- Degrees of Risk and Symbols9
- Tampering Warning9
- Safe Operation9
- Protective Clothing10
- Work Rules10
- Environment10
- Owner's Manual11
3 Important Notes12
- Manufacturer and Implied Warranty12
- Operating and Auxiliary Substances12
- Spare Parts, Accessories12
- Service12
- Figures12
- Customer Service12
4 View of Vehicle14
- View of Vehicle, Front Left (Example)14
- View of Vehicle, Rear Right (Example)15
5 Serial Numbers16
- Chassis Number16
- Type Label16
- Engine Number16
- Fork Part Number16
- Shock Absorber Article Number17
6 Controls18
- Clutch Lever18
- Hand Brake Lever18
- Throttle Grip18
- Kill Switch18
- Electric Starter Button (All XC Models)19
- Opening the Filler Cap19
- Closing the Filler Cap20
- Fuel Tap (All SX Models)21
- Fuel Tap (All XC Models)21
- Choke22
- Shift Lever22
- Kick Starter23
- Foot Brake Lever23
- Plug-In Stand (All SX Models)23
- Side Stand (All XC Models)24
- Service Hour Counter24
7 Preparing for Use 725
- Advice on First Use25
- Running in the Engine26
- Preparing the Vehicle for Difficult Operating Conditions26
- Preparing Vehicle for Rides on Dry Sand27
- Preparing Vehicle for Rides on Wet Sand28
- Preparing Vehicle for Rides on Wet and Muddy Circuits29
- Preparing Vehicle for High Temperatures or Slow Riding30
- Preparing Vehicle for Low Temperatures or Snow31
8 Riding Instructions32
- Checks and Maintenance Measures When Preparing for Use32
- Starting32
- Starting off33
- Shifting, Riding34
- Applying the Brakes34
- Stopping, Parking35
- Transporting35
- Refueling36
9 Service Schedule38
- Additional Information38
- Required Work38
- Recommended Work39
10 Tuning the Chassis 1041
- Checking the Basic Chassis Setting with the Rider's Weight41
- Air Suspension AER 4841
- Compression Damping of the Shock Absorber42
- Adjusting the Low-Speed Compression Damping of the Shock Absorber42
- Adjusting the High-Speed Compression Damping of the Shock Absorber43
- Adjusting the Rebound Damping of the Shock Absorber44
- Measuring the Rear Wheel Dimension Unloaded44
- Checking the Static Sag of the Shock Absorber45
- Checking the Riding Sag of the Shock Absorber46
- Adjusting the Spring Preload of the Shock Absorber46
- Adjusting the Riding Sag47
- Checking the Basic Setting of the Fork48
- Adjusting the Fork Air Pressure49
- Adjusting the Compression Damping of the Fork50
- Adjusting the Rebound Damping of the Fork51
- Handlebar Position51
- Adjusting the Handlebar Position52
11 Service Work on the Chassis54
- Raising the Motorcycle with a Lift Stand54
- Removing the Motorcycle from the Lift Stand54
- Bleeding the Fork Legs55
- Cleaning the Dust Boots of the Fork Legs55
- Removing the Fork Legs56
- Installing the Fork Legs56
- Removing the Fork Protector57
- Installing the Fork Protector57
- Removing the Lower Triple Clamp57
- Installing the Lower Triple Clamp58
- Checking the Play of the Steering Head Bearing60
- Adjusting the Steering Head Bearing Play61
- Lubricating the Steering Head Bearing61
- Removing the Start Number Plate62
- Installing the Start Number Plate62
- Removing Front Fender62
- Installing Front Fender62
- Removing the Shock Absorber63
- Installing the Shock Absorber64
- Removing the Seat66
- Mounting the Seat66
- Removing the Air Filter Box Cover67
- Installing the Air Filter Box Cover68
- Removing the Air Filter68
- Cleaning the Air Filter and Air Filter Box69
- Installing the Air Filter70
- Preparing Air Filter Box Cover for Securing70
- Removing the Main Silencer70
- Installing the Main Silencer71
- Changing the Glass Fiber Yarn Filling in the Main Silencer71
- Removing the Fuel Tank72
- Installing the Fuel Tank73
- Checking the Chain for Dirt75
- Cleaning the Chain75
- Checking the Chain Tension76
  - Adjusting the Chain Tension76
  - Checking the Chain, Rear Sprocket, Engine Sprocket, and Chain Guide77
  - Checking the Frame80
  - Checking the Swingarm80
  - Checking the Throttle Cable Routing80
  - Checking the Rubber Grip81
  - Adjusting Basic Position of Clutch Lever82
  - Checking/Correcting the Fluid Level of the Hydraulic Clutch82
  - Changing the Hydraulic Clutch Fluid83
12 Brake System 1285
- Checking the Free Travel of the Hand Brake Lever85
- Adjusting the Basic Position of the Hand Brake Lever85
- Checking the Brake Discs85
- Checking the Front Brake Fluid Level86
- Adding Front Brake Fluid87
- Checking the Front Brake Linings88
- Changing the Front Brake Linings88
- Checking the Free Travel of Foot Brake Lever91
- Adjusting the Basic Position of the Foot Brake Lever91
- Checking the Rear Brake Fluid Level92
- Adding Rear Brake Fluid92
- Checking the Brake Linings of the Rear Brake94
- Changing the Rear Brake Linings94
13 Wheels, Tires 1397
- Removing the Front Wheel97
- Installing the Front Wheel98
- Removing the Rear Wheel98
- Installing the Rear Wheel99
- Checking the Tire Condition101
- Checking the Tire Air Pressure101
- Checking Spoke Tension102
14 Electrical System 14103
- Removing the Battery (All XC Models)103
- Installing the Battery (All XC Models)103
- Recharging the Battery (All XC Models)104
- Changing the Main Fuse (All XC Models)106
15 Cooling System 15107
- Checking the Antifreeze and Coolant Level107
- Checking the Coolant Level108
- Draining the Coolant109
- Refilling with Coolant110
16 Tuning the Engine112
- Checking the Play in the Throttle Cable112
- Adjusting the Play in the Throttle Cable112
- Carburetor Setting113
- Carburetor - Idle115
- Carburetor - Adjusting the Idle Speed116
- Plug-In Connector of Ignition Timing Map Adjustment117
- Changing the Ignition Timing Map118
- Checking the Basic Position of the Shift Lever118
- Adjusting the Basic Position of the Shift Lever118
- Engine Characteristic - Auxiliary Spring119
- Engine Characteristic - Adjusting the Auxiliary Spring119
17 Service Work on the Engine122
- Emptying the Carburetor Float Chamber122
- Checking the Gear Oil Level123
- Changing the Gear Oil123
- Adding Gear Oil124
18 Cleaning, Care126
- Cleaning the Motorcycle126
19 Storage128
- Preparing for Use after Storage129
20 Troubleshooting130
21 Technical Data132
- Engine132
- All SX Models132
- XC Us132
- XC Us133
- Engine Tightening Torques134
- All SX Models134
- All XC Models135
- Carburetor137
- All SX Models137
- Carburetor Tuning (All SX Models)137
- Carburetor - Basic Setting for Sandy Surfaces (All SX Models)138
- 250 XC Us139
- Carburetor Tuning (250 XC US)139
- 300 XC Us141
- Carburetor Tuning (300 XC US)141
- Capacities142
- Gear Oil142
- Coolant142
- Fuel142
- Chassis142
- Electrical System143
- Tires143
- Fork143
- Sx Eu143
- Sx Us144
- All XC Models144
- Shock Absorber145
- Sx Eu145
- Sx Us145
- All XC Models146
- Chassis Tightening Torques147
22 Substances 22149
23 Auxiliary Substances 23151
24 Standards 24153
25 List of Abbreviations154
- Index155

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KTM 250 SX 2019 Specifications

General

Displacement	249 cc
Bore x Stroke	66.4 mm x 72 mm
Starter	Kickstarter
Transmission	5-speed
Ignition	Kokusan
Ground Clearance	375 mm
Seat Height	950 mm
Engine Type	2-stroke
Clutch	Wet, multi-disc clutch
Frame Type	Central double-cradle type 25CrMo4 steel
Front Suspension	WP XACT 48 mm fork
Rear Suspension	WP XACT shock absorber with linkage
Front Brake	Disc brake, 260 mm
Rear Brake	Disc brake, 220 mm
Fuel Tank Capacity	7.5 liters