Contents

1 MEANS OF REPRESENTATION
- 1.1 Symbols used
- 1.2 Formats used
2 SAFETY ADVICE
- 2.1 Use definition - intended use
- 2.2 Safety advice
- 2.3 Degrees of risk and symbols
- 2.4 Tampering warning
- 2.5 Safe operation
- 2.6 Protective clothing
- 2.7 Work rules
- 2.8 Environment
- 2.9 Owner's Manual
3 IMPORTANT NOTES
- 3.1 Manufacturer and implied warranty
- 3.2 Operating and auxiliary substances
- 3.3 Spare parts, accessories
- 3.4 Service
- 3.5 Figures
- 3.6 Customer service
4 VIEW OF VEHICLE
- 4.1 View of vehicle, front left (example)
- 4.2 View of vehicle, rear right (example)
5 SERIAL NUMBERS
- 5.1 Chassis number
- 5.2 Type label
- 5.3 Engine number
- 5.4 Fork part number
- 5.5 Shock absorber article number
6 CONTROLS
- 6.1 Clutch lever
- 6.2 Hand brake lever
- 6.3 Throttle grip
- 6.4 Kill switch
- 6.5 Electric starter button (All XC models)
- 6.6 Opening the filler cap
- 6.7 Closing the filler cap
- 6.8 Fuel tap (All SX models)
- 6.9 Fuel tap (All XC models)
- 6.10 Choke
- 6.11 Shift lever
- 6.12 Kick starter
- 6.13 Foot brake lever
- 6.14 Plug-in stand (All SX models)
- 6.15 Side stand (All XC models)
- 6.16 Service hour counter
7 PREPARING FOR USE
- 7.1 Advice on first use
- 7.2 Running in the engine
- 7.3 Preparing the vehicle for difficult riding conditions
- 7.4 Preparing for rides on dry sand
- 7.5 Preparing for rides on wet sand
- 7.6 Preparing for rides on wet and muddy surfaces
- 7.7 Preparations for riding at high temperatures and low speeds
- 7.8 Preparing for rides at low temperature or in snow
8 RIDING INSTRUCTIONS
- 8.1 Checks and maintenance work when preparing for use
- 8.2 Starting
- 8.3 Starting off
- 8.4 Shifting, riding
- 8.5 Braking
- 8.6 Stopping, parking
- 8.7 Transport
- 8.8 Refueling
9 SERVICE SCHEDULE
- 9.1 All SX models
  - 9.1.1 Additional information
  - 9.1.2 Required work
  - 9.1.3 Recommended work
- 9.2 All XC models
  - 9.2.1 Additional information
  - 9.2.2 Required work
  - 9.2.3 Recommended work
10 TUNING THE CHASSIS
- 10.1 Checking the basic chassis setting with the rider's weight
- 10.2 Air suspension AER 48
- 10.3 Compression damping of the shock absorber
- 10.4 Adjusting the low-speed compression damping of the shock absorber
- 10.5 Adjusting the high-speed compression damping of the shock absorber
- 10.6 Adjusting the rebound damping of the shock absorber
- 10.7 Measuring the rear wheel dimension unloaded
- 10.8 Checking the static sag of the shock absorber
- 10.9 Checking the riding sag of the shock absorber
- 10.10 Adjusting the spring preload of the shock absorber
- 10.11 Adjusting the riding sag
- 10.12 Checking the basic setting of the fork
- 10.13 Adjusting the fork air pressure
- 10.14 Adjusting the compression damping of the fork
- 10.15 Adjusting the rebound damping of the fork
- 10.16 Handlebar position
- 10.17 Adjusting the handlebar position
11 SERVICE WORK ON THE CHASSIS
- 11.1 Raising the motorcycle with a lift stand
- 11.2 Removing the motorcycle from the lift stand
- 11.3 Bleeding the fork legs
- 11.4 Cleaning the dust boots of the fork legs
- 11.5 Removing the fork legs
- 11.6 Installing the fork legs
- 11.7 Removing the fork protector
- 11.8 Installing the fork protector
- 11.9 Removing the lower triple clamp
- 11.10 Installing the lower triple clamp
- 11.11 Checking the play of the steering head bearing
- 11.12 Adjusting the steering head bearing play
- 11.13 Greasing the steering head bearing
- 11.14 Removing the start number plate
- 11.15 Installing the start number plate
- 11.16 Removing the front fender
- 11.17 Installing the front fender
- 11.18 Removing the shock absorber
- 11.19 Installing the shock absorber
- 11.20 Removing the seat
- 11.21 Mounting the seat
- 11.22 Removing the air filter box cover
- 11.23 Installing the air filter box cover
- 11.24 Removing the air filter
- 11.25 Cleaning the air filter and air filter box
- 11.26 Installing the air filter
- 11.27 Securing the air filter box cover
- 11.28 Sealing the air filter box
- 11.29 Removing the main silencer
- 11.30 Installing the main silencer
- 11.31 Changing the glass fiber yarn filling in the main silencer
- 11.32 Removing the fuel tank
- 11.33 Installing the fuel tank
- 11.34 Checking the chain for dirt
- 11.35 Cleaning the chain
- 11.36 Checking the chain tension
- 11.37 Adjusting the chain tension
- 11.38 Checking the chain, rear sprocket, engine sprocket, and chain guide
- 11.39 Checking the frame
- 11.40 Checking the swingarm
- 11.41 Checking the throttle cable routing
- 11.42 Checking the rubber grip
- 11.43 Adjusting basic position of clutch lever
- 11.44 Checking/correcting the fluid level of the hydraulic clutch
- 11.45 Changing the hydraulic clutch fluid
12 BRAKE SYSTEM
- 12.1 Checking the free travel of the hand brake lever
- 12.2 Adjusting the basic position of the hand brake lever
- 12.3 Checking the brake discs
- 12.4 Checking the front brake fluid level
- 12.5 Adding front brake fluid
- 12.6 Checking the front brake linings
- 12.7 Changing the front brake linings
- 12.8 Checking the free travel of foot brake lever
- 12.9 Adjusting the basic position of the foot brake lever
- 12.10 Checking the rear brake fluid level
- 12.11 Adding rear brake fluid
- 12.12 Checking the rear brake linings
- 12.13 Changing the rear brake linings
13 WHEELS, TIRES
- 13.1 Removing the front wheel
- 13.2 Installing the front wheel
- 13.3 Removing the rear wheel
- 13.4 Installing the rear wheel
- 13.5 Checking the tire condition
- 13.6 Checking the tire air pressure
- 13.7 Checking spoke tension
14 ELECTRICAL SYSTEM
- 14.1 Removing the battery (All XC models)
- 14.2 Installing the battery (All XC models)
- 14.3 Recharging the battery (All XC models)
- 14.4 Changing the main fuse (All XC models)
15 COOLING SYSTEM
- 15.1 Cooling system
- 15.2 Radiator cover (All 125/150 models)
- 15.3 Installing the radiator cover (All 125/150 models)
- 15.4 Removing the radiator cover (All 125/150 models)
- 15.5 Checking the antifreeze and coolant level
- 15.6 Checking the coolant level
- 15.7 Draining the coolant
- 15.8 Refilling with coolant
16 TUNING THE ENGINE
- 16.1 Checking the play in the throttle cable
- 16.2 Adjusting the play in the throttle cable
- 16.3 Carburetor setting
- 16.4 Carburetor idle
- 16.5 Carburetor adjusting the idle speed
- 16.6 Plug-in connector of ignition timing map adjustment
- 16.7 Changing the ignition timing map
- 16.8 Checking the basic position of the shift lever
- 16.9 Adjusting the basic position of the shift lever
- 16.10 Engine characteristic auxiliary spring (All 250/300 models)
- 16.11 Engine characteristic setting the auxiliary spring (All 250/300 models)
17 SERVICE WORK ON THE ENGINE
- 17.1 Emptying the carburetor float chamber
- 17.2 Checking the gear oil level
- 17.3 Changing the gear oil
- 17.4 Adding gear oil
18 CLEANING, CARE
- 18.1 Cleaning the motorcycle
19 STORAGE
- 19.1 Storage
- 19.2 Preparing for use after storage
20 TROUBLESHOOTING
21 TECHNICAL DATA
- 21.1 Engine
  - 21.1.1 All 125 models
  - 21.1.2 All 150 models
  - 21.1.3 All 250 SX models
  - 21.1.4 250 XC US
  - 21.1.5 300 XC US
- 21.2 Engine tightening torques
  - 21.2.1 All 125/150 models
  - 21.2.2 All 250 SX models
  - 21.2.3 All XC models
- 21.3 Carburetor
  - 21.3.1 All 125 models
  - 21.3.2 Carburetor - basic setting for sandy surfaces (All 125 models)
  - 21.3.3 Carburetor tuning (All 125 models)
  - 21.3.4 All 150 models
  - 21.3.5 Basic carburetor setting for sandy surfaces (All 150 models)
  - 21.3.6 Carburetor tuning (All 150 models)
  - 21.3.7 All 250 SX models
  - 21.3.8 Carburetor - basic setting for sandy surfaces (All 250 SX models)
  - 21.3.9 Carburetor tuning (All 250 SX models)
  - 21.3.10 250 XC US
  - 21.3.11 Carburetor tuning (250 XC US)
  - 21.3.12 300 XC US
  - 21.3.13 Carburetor tuning (300 XC US)
- 21.4 Capacities
  - 21.4.1 Gear oil
  - 21.4.2 Coolant
  - 21.4.3 Fuel
- 21.5 Chassis
- 21.6 Electrical system
- 21.7 Tires
- 21.8 Fork
  - 21.8.1 All 125/150 models
  - 21.8.2 All 250 SX models
  - 21.8.3 All XC models
- 21.9 Shock absorber
  - 21.9.1 All 125/150 models
  - 21.9.2 250 SX EU
  - 21.9.3 250 SX US
  - 21.9.4 All XC models
- 21.10 Chassis tightening torques
22 SUBSTANCES
23 AUXILIARY SUBSTANCES
24 STANDARDS
25 LIST OF ABBREVIATIONS
INDEX
- A
- B
- C
- D
- E
- F
- G
- H
- I
- K
- L
- M
- O
- P
- R
- S
- T
- U
- V
- W

KTM SX 125 2017 Owner's Manual

Pages 137

Year 2017

Language(s)

of 137

KTM SX 125 2017 Motorcycle Specification

The KTM SX 125 2017 is a high-performance motocross motorcycle designed for competitive racing. It features a lightweight, high-strength chromoly steel frame that enhances handling and agility. The heart of the bike is a 124.8cc two-stroke engine, delivering impressive power and responsiveness. This engine is paired with a six-speed transmission, enabling smooth and precise gear shifts. The KTM SX 125 2017 is equipped with a cutting-edge WP AER 48 front suspension system and a WP monoshock rear suspension, providing exceptional damping and stability over rough terrain.

The bike's braking system includes high-performance Brembo calipers and wave disc brakes, ensuring reliable stopping power. Its wheels are fitted with lightweight, durable rims and high-traction tires, optimizing grip and control. The ergonomic design of the KTM SX 125 2017 offers a comfortable riding position, with a slim seat and easily accessible controls. The motorcycle also features a modern bodywork design, which not only enhances its aesthetic appeal but also improves aerodynamics.

In addition, the KTM SX 125 2017 comes with advanced electronics, including a sophisticated engine management system that ensures optimal performance under various riding conditions. The bike's lightweight construction, combined with its powerful engine and advanced suspension, makes it a formidable contender in motocross racing. With its blend of cutting-edge technology and meticulous engineering, the KTM SX 125 2017 stands out as a top choice for riders seeking a competitive edge on the track.

KTM SX 125 2017 Motorcycle F.A.Q.

What type of fuel is recommended for the KTM SX 125 2017?

The KTM SX 125 2017 is recommended to use unleaded gasoline with an octane rating of at least 95 RON.

How often should the air filter be cleaned on the KTM SX 125 2017?

The air filter should be checked and cleaned after every race or every 10 hours of riding in dusty conditions to ensure optimal performance.

What is the recommended tire pressure for the KTM SX 125 2017?

For the KTM SX 125 2017, the recommended tire pressure is 1.0 to 1.2 bar (14.5 to 17.4 psi) for both front and rear tires.

How do you adjust the suspension on the KTM SX 125 2017?

To adjust the suspension on the KTM SX 125 2017, refer to the owner's manual for specific settings. You can adjust the compression and rebound damping on both the front forks and the rear shock absorber to suit your riding style and terrain.

What is the correct engine oil type and capacity for the KTM SX 125 2017?

The correct engine oil type for the KTM SX 125 2017 is a high-quality 2-stroke engine oil. The oil capacity is approximately 0.8 liters (0.21 US gallons).

How can I troubleshoot starting issues on the KTM SX 125 2017?

If you're experiencing starting issues, check the spark plug for wear or fouling, ensure the fuel is fresh, and verify that the carburetor is clean and properly adjusted.

What maintenance schedule should be followed for the KTM SX 125 2017?

Regular maintenance includes checking and cleaning the air filter, inspecting the chain tension, checking tire pressure, and changing the engine oil after every 10 hours of riding. Refer to the owner's manual for a detailed maintenance schedule.

How do I adjust the chain tension on the KTM SX 125 2017?

To adjust the chain tension, place the motorcycle on a stand, loosen the rear axle nut, adjust the chain adjuster bolts evenly on both sides, and ensure there is about 55-58 mm (2.17-2.28 inches) of slack in the chain.

What should I do if the KTM SX 125 2017 overheats?

If the motorcycle overheats, stop riding immediately, allow it to cool down, check the coolant level, and inspect the radiator for any blockages or leaks. Ensure the coolant mixture is correct.

How do I replace the spark plug on the KTM SX 125 2017?

To replace the spark plug, remove the spark plug cap, use a spark plug socket to unscrew the old plug, check the gap on the new plug, and install it by hand to avoid cross-threading before tightening with a wrench.