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 Guarantee, 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 the vehicle from the left front (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 part 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 (250/300 XC)
- 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)
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 Preparations for riding on dry sand
- 7.5 Preparations for riding on wet sand
- 7.6 Preparations for riding on wet and muddy surfaces
- 7.7 Preparations for riding at high temperatures and low speeds
- 7.8 Preparing for riding at low temperatures 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 Service schedule
  - 9.1.2 Service work (as additional order)
- 9.2 All XC models
  - 9.2.1 Service schedule
  - 9.2.2 Service work (as additional order)
10 TUNING THE CHASSIS
- 10.1 Checking the basic chassis setting with the rider's weight
- 10.2 Compression damping of shock absorber
- 10.3 Adjusting the low-speed compression damping of the shock absorber
- 10.4 Adjusting the high-speed compression damping of the shock absorber
- 10.5 Adjusting the rebound damping of the shock absorber
- 10.6 Measuring the sag of the unloaded rear wheel
- 10.7 Checking the static sag of the shock absorber
- 10.8 Checking the riding sag of the shock absorber
- 10.9 Adjusting the spring preload of the shock absorber x
- 10.10 Adjusting the riding sag x
- 10.11 Checking the basic setting of the fork
- 10.12 Adjusting the compression damping of the fork
- 10.13 Adjusting the rebound damping of the fork
- 10.14 Handlebar position
- 10.15 Adjusting the handlebar position x
11 SERVICE WORK ON THE CHASSIS
- 11.1 Raising the motorcycle with the 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 Loosening the fork protection
- 11.6 Positioning the fork protection
- 11.7 Removing the fork legs x
- 11.8 Installing the fork legs x
- 11.9 Removing the fork protector x
- 11.10 Installing the fork protector x
- 11.11 Removing the lower triple clamp x
- 11.12 Installing the lower triple clamp x
- 11.13 Checking the play of the steering head bearing
- 11.14 Adjusting the play of the steering head bearing x
- 11.15 Greasing the steering head bearing x
- 11.16 Removing the start number plate
- 11.17 Installing the start number plate
- 11.18 Removing the front fender
- 11.19 Installing the front fender
- 11.20 Removing the shock absorber x
- 11.21 Installing the shock absorber x
- 11.22 Removing the seat
- 11.23 Mounting the seat
- 11.24 Removing the air filter box lid
- 11.25 Installing the air filter box lid
- 11.26 Removing the air filter x
- 11.27 Cleaning the air filter and air filter box x
- 11.28 Installing the air filter x
- 11.29 Securing the air filter box lid x
- 11.30 Sealing the air filter box x
- 11.31 Removing the main silencer
- 11.32 Installing the main silencer
- 11.33 Changing the glass fiber yarn filling of the main silencer x
- 11.34 Removing the fuel tank x
- 11.35 Installing the fuel tank x
- 11.36 Checking the chain for dirt
- 11.37 Cleaning the chain
- 11.38 Checking the chain tension
- 11.39 Adjusting the chain tension
- 11.40 Checking the chain, rear sprocket, engine sprocket and chain guide
- 11.41 Checking the frame x
- 11.42 Checking the swingarm x
- 11.43 Checking the routing of the throttle cable
- 11.44 Checking the rubber grip
- 11.45 Additionally securing the rubber grip
- 11.46 Adjusting the basic position of the clutch lever
- 11.47 Checking/correcting the fluid level of the hydraulic clutch
- 11.48 Changing the hydraulic clutch fluid x
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 x
- 12.6 Checking the front brake linings
- 12.7 Changing the front brake linings x
- 12.8 Checking the free travel of foot brake lever
- 12.9 Adjusting the basic position of the foot brake lever x
- 12.10 Checking the rear brake fluid level
- 12.11 Adding brake fluid for the rear brake x
- 12.12 Checking the rear brake linings
- 12.13 Changing the rear brake linings x
13 WHEELS, TIRES
- 13.1 Removing the front wheel x
- 13.2 Installing the front wheel x
- 13.3 Removing the rear wheel x
- 13.4 Installing the rear wheel x
- 13.5 Checking the tire condition
- 13.6 Checking the tire air pressure
- 13.7 Checking the spoke tension
14 ELECTRICAL SYSTEM
- 14.1 Removing the battery x (250/300 XC)
- 14.2 Installing the battery x (250/300 XC)
- 14.3 Recharging the battery x (250/300 XC)
- 14.4 Changing the main fuse (250/300 XC)
15 COOLING SYSTEM
- 15.1 Cooling system
- 15.2 Radiator cover (All SX models)
- 15.3 Installing the radiator cover (All SX models)
- 15.4 Removing the radiator cover (All SX models)
- 15.5 Checking the antifreeze and coolant level
- 15.6 Checking the coolant level
- 15.7 Draining the coolant x
- 15.8 Refilling with coolant x
16 TUNING THE ENGINE
- 16.1 Checking the play in the throttle cable
- 16.2 Adjusting the play in the throttle cable x
- 16.3 Carburetor - idle
- 16.4 Carburetor - adjusting the idle speed x
- 16.5 Emptying the carburetor float chamber x
- 16.6 Plug-in connection, ignition timing map
- 16.7 Changing the ignition curve
- 16.8 Checking the basic position of the shift lever
- 16.9 Adjusting the basic position of the shift lever x
- 16.10 Engine characteristic - auxiliary spring (All 250/300 models)
- 16.11 Engine characteristic - set the auxiliary spring x (All 250/300 models)
17 SERVICE WORK ON THE ENGINE
- 17.1 Checking the gear oil level
- 17.2 Changing the gear oil x
- 17.3 Draining the gear oil x
- 17.4 Refilling with gear oil x
- 17.5 Adding gear oil x
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
  - 21.1.1 125 SX EU, 125 SX USA
  - 21.1.2 150 SX EU, 150 SX USA
  - 21.1.3 250 SX EU, 250 SX USA
  - 21.1.4 150 XC USA
  - 21.1.5 250 XC EU/USA
  - 21.1.6 300 XC EU/USA
- 21.2 Engine tightening torques
  - 21.2.1 All 125/150 models
  - 21.2.2 250 SX EU, 250 SX USA
  - 21.2.3 250/300 XC
- 21.3 Carburetor
  - 21.3.1 125 SX EU, 125 SX USA
  - 21.3.2 Carburetor - basic setting for sandy surfaces (125 SX EU, 125 SX USA)
  - 21.3.3 Carburetor tuning (125 SX EU, 125 SX USA)
  - 21.3.4 150 SX EU, 150 SX USA
  - 21.3.5 Carburetor - basic setting for sandy surfaces (150 SX EU, 150 SX USA)
  - 21.3.6 Carburetor tuning (150 SX EU, 150 SX USA)
  - 21.3.7 250 SX EU, 250 SX USA
  - 21.3.8 Carburetor - basic setting for sandy surfaces (250 SX EU, 250 SX USA)
  - 21.3.9 Carburetor tuning (250 SX EU, 250 SX USA)
  - 21.3.10 150 XC USA
  - 21.3.11 Carburetor tuning (150 XC USA)
  - 21.3.12 250 XC EU/USA
  - 21.3.13 Carburetor tuning (250 XC EU/USA)
  - 21.3.14 300 XC EU/USA
  - 21.3.15 Carburetor tuning (300 XC EU/USA) x
- 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
  - 21.8.1 125 SX EU, 150 SX EU
  - 21.8.2 125 SX USA, 150 SX USA
  - 21.8.3 250 SX EU
  - 21.8.4 250 SX USA
  - 21.8.5 150 XC USA
  - 21.8.6 250/300 XC
- 21.9 Shock absorber
  - 21.9.1 125 SX EU, 150 SX EU
  - 21.9.2 125 SX USA, 150 SX USA
  - 21.9.3 250 SX EU
  - 21.9.4 250 SX USA
  - 21.9.5 150 XC USA
  - 21.9.6 250/300 XC
- 21.10 Chassis tightening torques
22 SUBSTANCES
23 AUXILIARY SUBSTANCES
24 STANDARDS
INDEX
- A
- B
- C
- D
- E
- F
- G
- H
- I
- K
- L
- M
- O
- P
- R
- S
- T
- U
- V
- W

KTM SX 125 EU 2014 Owner's Manual

KTM SX 125 EU 2014 Motorcycle manual cover

Pages 135

Year 2014

Language(s)

of 135

KTM SX 125 EU 2014 Motorcycle Specification

The KTM SX 125 EU 2014 is a high-performance motocross motorcycle engineered for competitive racing and demanding terrain. Featuring a robust 124.8cc, single-cylinder, two-stroke engine, the bike delivers impressive power-to-weight ratio, making it a formidable choice for riders seeking agility and responsiveness. The engine incorporates KTM's advanced technology, including a reed valve intake system and a high-performance exhaust, optimizing fuel flow and combustion efficiency.

The chassis is constructed from lightweight, high-strength chromium-molybdenum steel, providing exceptional durability and stability. The frame design enhances rider ergonomics, ensuring superior control and comfort during high-speed maneuvers. The suspension system comprises WP components, with a 48mm front fork and a fully adjustable rear shock absorber, offering customizable damping and rebound to suit various track conditions.

Braking performance is ensured by Brembo hydraulic brakes, featuring a 260mm front disc and a 220mm rear disc, providing reliable stopping power and precise modulation. The bike is equipped with Excel rims and lightweight spokes, paired with high-traction tires to ensure optimal grip and handling on diverse surfaces.

Additional features include a 6-speed transmission for smooth and versatile gear shifting, a high-capacity airbox designed for efficient airflow, and a lightweight, ergonomically designed seat that enhances rider comfort and control. The KTM SX 125 EU 2014 also boasts a sleek, aggressive design with race-inspired graphics, underscoring its competitive pedigree. This motorcycle is tailored for riders who demand peak performance, precision engineering, and cutting-edge technology in their pursuit of motocross excellence.

KTM SX 125 EU 2014 Motorcycle F.A.Q.

What is the recommended engine oil for the KTM SX 125 EU 2014?

The recommended engine oil for the KTM SX 125 EU 2014 is a high-quality two-stroke oil, such as Motorex Cross Power 2T, which ensures optimal performance and protection.

How often should I clean the air filter on my KTM SX 125 EU 2014?

The air filter should be cleaned after every 5 hours of operation or more frequently if you ride in dusty conditions. This helps maintain engine performance and longevity.

What is the correct spark plug gap for a KTM SX 125 EU 2014?

The correct spark plug gap for the KTM SX 125 EU 2014 is 0.6-0.7 mm. It's important to check and adjust the gap to ensure proper ignition and engine performance.

How can I troubleshoot a starting issue with my KTM SX 125 EU 2014?

If your KTM SX 125 EU 2014 is having trouble starting, check the fuel supply, ensure the spark plug is clean and properly gapped, and verify that the carburetor is clean. Additionally, inspect the ignition system for any faults.

What is the recommended tire pressure for the KTM SX 125 EU 2014?

The recommended tire pressure for the KTM SX 125 EU 2014 is 1.0 to 1.2 bar (14.5 to 17.4 psi) for both front and rear tires, depending on the terrain and rider preference.

How often should I replace the transmission oil in my KTM SX 125 EU 2014?

The transmission oil in your KTM SX 125 EU 2014 should be replaced every 10 hours of operation or after every race to ensure optimal gear function and longevity.

What is the correct chain tension for the KTM SX 125 EU 2014?

The correct chain tension for the KTM SX 125 EU 2014 should allow for 8-10 mm of vertical movement midway between the front and rear sprockets when properly adjusted.

How can I improve the suspension performance on my KTM SX 125 EU 2014?

To improve suspension performance, ensure that the suspension settings are correctly adjusted for your weight and riding style. Regularly service the fork and shock absorber, and consider upgrading components for enhanced performance.

What should I do if the KTM SX 125 EU 2014 overheats?

If the KTM SX 125 EU 2014 overheats, check the coolant level and radiator for blockages. Ensure that the cooling system is functioning properly, and avoid running the engine at high RPMs for extended periods.

How do I properly store my KTM SX 125 EU 2014 for the off-season?

To store your KTM SX 125 EU 2014 for the off-season, clean the bike thoroughly, drain the fuel tank or add a fuel stabilizer, lubricate moving parts, and store it in a cool, dry place. Additionally, disconnect the battery to prevent discharge.