KTM 250 SX-F EU 2010 User Manual (English)

Questions and Answers:

B
Brian SullivanAug 15, 2025
What to do if my KTM 250 SX-F EU 2010 Motorcycle engine turns but does not start?
- J
  Jennifer MillerAug 15, 2025
  If your KTM Motorcycle engine turns but does not start, consider these potential causes: operating error, old fuel in the float chamber (if the motorcycle was out of use for a long time), a flooded engine, an oily or wet spark plug, an incorrect electrode distance on the spark plug, a defect in the ignition system, a short-circuit cable, oxidized plug connectors, or water in the carburetor. Go through the engine starting steps. Empty the carburetor float chamber if there is old fuel. Clean and dry the spark plug, adjusting or replacing it if needed. Adjust the plug gap to 0.7 mm (0.028 in). Check the wiring harness and electrical system for short circuits. Clean oxidized plug connectors with contact spray. Have the ignition system and carburetor components checked.
U
uhammondAug 18, 2025
Why does my KTM 250 SX-F EU 2010 engine have a lack of power?
- A
  allenmichaelAug 18, 2025
  If your KTM Motorcycle engine has a lack of power, it could be due to an interrupted fuel feed, a severely contaminated air filter, a leaky or deformed exhaust system, too little glass fiber yarn filling in the main silencer, too little valve clearance, or a defective ignition system. Check the fuel tank breather and clean the fuel tap. Also, check and adjust the carburetor components. Clean the air filter. Inspect the exhaust system for damage and replace the glass fiber yarn filling if needed. Have the valve clearance adjusted and the ignition system checked.
C
cherylhaysAug 21, 2025
What to do if KTM Motorcycle engine does not speed up?
- A
  Alyssa RodriguezAug 21, 2025
  If the KTM Motorcycle engine does not speed up, potential causes include the carburetor running over due to a dirty or worn float needle, loose carburetor jets, or a defective ignition system. Have the carburetor components checked and adjusted. Also, have the ignition coil, CDI controller, spark plug connector, ignition pulse generator, and generator checked.
S
Stacy MurphyAug 25, 2025
How to fix KTM Motorcycle when the engine cannot be cranked?
- M
  Mr. Richard Wheeler DVMAug 25, 2025
  If your KTM Motorcycle engine cannot be cranked, possible causes include operating error, a discharged battery, a blown fuse, a defective starter relay, or a defective starter motor. Address operating errors by reviewing the engine starting steps. If the battery is discharged, recharge it and check the charging voltage, stall current, and generator. For a blown fuse, replace it. If the starter relay or motor is defective, have them checked.
D
Deanna WoodAug 27, 2025
What causes KTM 250 SX-F EU 2010 Motorcycle engine to overheat?
- C
  Cameron AndersonAug 28, 2025
  If your KTM Motorcycle engine overheats, it could be due to low coolant level, insufficient airflow, very dirty radiator fins, foam formation in the cooling system, a bent radiator hose, a defective thermostat, or a defect in the radiator fan system. Check the cooling system for leaks and ensure the coolant level is correct. Switch off the engine when stationary to allow for better airflow. Clean the radiator fins. Have the coolant drained and refilled, the radiator hose changed, and the thermostat checked. Also, check the radiator fan fuse, the radiator fan, and the thermostat.
J
Jeanette AdamsAug 30, 2025
How can I fix KTM 250 SX-F EU 2010 Motorcycle engine when it has no idle?
- M
  Meghan SchwartzAug 30, 2025
  If your KTM Motorcycle engine has no idle, it could be caused by a blocked idling jet, distorted adjusting screws on the carburetor, a defective spark plug, or a defective ignition system. Have the carburetor components checked and adjusted. Adjust the idle speed on the carburetor. Change the spark plug. Have the ignition coil, CDI controller, spark plug connector, ignition pulse generator, and generator checked.
C
Charles PittmanSep 2, 2025
Why does my KTM Motorcycle engine stall or pop back into the carburetor?
- J
  Joseph NicholsSep 2, 2025
  If your KTM Motorcycle engine stalls or pops back into the carburetor, it may be due to a lack of fuel or an air leak in the intake system. For a lack of fuel, turn the fuel tap to the ON position and refuel. Check the rubber sleeves and carburetor for tightness to address any air leaks.
B
briannakleinSep 5, 2025
What causes high oil consumption in my KTM 250 SX-F EU 2010 Motorcycle?
- B
  Brandon SmithSep 5, 2025
  High oil consumption in your KTM Motorcycle can be attributed to a bent engine vent hose, an engine oil level that is too high, engine oil that is too thin, or worn piston or cylinder. Ensure the vent hose is routed without bends, replacing it if necessary. Check and correct the engine oil level. Change the engine oil and oil filter, and clean the oil screen if the oil is too thin. Determine the mounting clearance of the piston/cylinder.
D
dwalterSep 8, 2025
Why is my KTM Motorcycle battery discharged?
- T
  Tonya MooreSep 8, 2025
  If your KTM Motorcycle battery is discharged, it may be due to the battery not charging or an undesired power consumer. Have the charging voltage, charging current, and generator checked. Also, check the stall current.

KTM 250 SX-F EU 2010 Specifications

General

Brand	KTM
Model	250 SX-F EU 2010
Category	Motorcycle
Language	English

Summary

Means of Representation

Symbols Used

Explains symbols used for work steps, reactions, and references.

Formats Used

Explains typographical formats for specific names and brands.

Important Information

Use Definitions and Model Suitability

Defines intended use for EXC-F, EXC-F SIX DAYS, XCF-W, and SX-F models.

Maintenance, Warranty, and Parts Advice

Emphasizes proper maintenance, details warranty terms, and advises on parts.

Transport, Environment, and Risk Grades

Notes on transport, environmental responsibility, and definitions of risk levels.

View of Vehicle

Vehicle from Left Front

Illustrates the motorcycle from the front-left, labeling key components.

Vehicle from Right Rear

Illustrates the motorcycle from the rear-right, labeling key components.

Location of Serial Numbers

Chassis, Type Label, and Key Numbers

Shows locations for chassis, type label, and key numbers.

Engine and Fork Part Numbers

Identifies locations for engine and fork part numbers.

Shock Absorber Part Number

Indicates the location of the shock absorber part number.

Controls

Handlebar Controls

Clutch, brake, starter, light, horn, and turn signal switches.

Speedometer and Tripmaster Functions

Speedometer modes, settings, and optional tripmaster functions.

Fuel Tap, Choke, and Starting Aids

Managing fuel supply, cold starts, and engine starting.

Chassis Controls: Stands and Steering Lock

Foot brake, kick starter, side stands, and steering lock operation.

General Tips and Hints on Putting into Operation

Advice on First Use

Safety and preparation steps before the first ride.

Engine Break-in and Riding Condition Preparation

Guidelines for engine run-in and preparing for various riding conditions.

Riding Instructions

Pre-Ride Checks and Engine Starting

Essential checks before starting the engine and starting procedures.

Riding Techniques, Braking, and Parking

Guidance on shifting, riding, braking, stopping, and parking.

Refueling Safety and Guidelines

Safety precautions and steps for refueling the motorcycle.

Service Schedules

Workshop Maintenance: EXC-F, EXC-F SIX DAYS, XCF-W

Scheduled maintenance by KTM workshop for specific models.

Workshop Maintenance: SX-F

Scheduled maintenance by KTM workshop for SX-F models.

Rider Maintenance Tasks

Routine checks and maintenance tasks for the owner.

Maintenance Work on Chassis and Engine

Suspension System Adjustment

Adjusting fork and shock absorber settings for damping and preload.

Wheel, Tire, and Chain Maintenance

Servicing wheels, tires, chain tension, wear, and sprockets.

Brake System Maintenance and Checks

Inspection and replacement of brake discs, pads, and fluid.

Fluid Levels and Changes

Checking and changing engine oil, coolant, and clutch fluid.

Air Filter and Carburetor Maintenance

Cleaning, inspecting, and adjusting air filter and carburetor.

Cleaning

Motorcycle Cleaning Procedures

Detailed instructions for cleaning the motorcycle safely.

Storage

Long-Term Storage Preparation

Steps for preparing the motorcycle for long-term storage.

Putting into Operation After Storage

Steps to take the motorcycle out of storage and prepare it for use.

Technical Data

Engine Specifications and Tightening Torques

Details on engine design, capacities, and tightening values.

Chassis, Carburetor, Fork, and Shock Absorber Specifications

Specs for chassis, carburetor, fork, shock absorber, tires, and lighting.

Wiring Diagram

Wiring Diagram: EXC-F EU, EXC-F SIX DAYS

Electrical schematic for EXC-F EU and EXC-F SIX DAYS models.

Wiring Diagram: EXC-F AUS

Electrical schematic for EXC-F AUS models.

Wiring Diagram: XCF-W

Electrical schematic for XCF-W models.

Wiring Diagram: SX-F

Electrical schematic for SX-F models.

Substances and Auxiliary Products

Recommended Fluids and Lubricants

Approved brake fluids, coolant, engine oil, fork oil, and fuel.

Cleaning Agents and Sprays

Recommended air filter cleaner, chain cleaner, motorcycle cleaner, and sprays.

Standards

JASO T903 MA Standard

Explanation of the JASO T903 MA standard for motorcycle oils.

SAE Viscosity Classes

Explanation of SAE viscosity classes for oils.

Related product manuals

KTM 250 SX-F USA 2010

125 pages

KTM 250 XC EU 2010

140 pages

KTM 250 EXC-F EU 2010

KTM 250 SX-F EU 2010 User Manual

Table of Contents

Questions and Answers:

KTM 250 SX-F EU 2010 Specifications

Summary

Means of Representation

Symbols Used

Formats Used

Important Information

Use Definitions and Model Suitability

Maintenance, Warranty, and Parts Advice

Transport, Environment, and Risk Grades

View of Vehicle

Vehicle from Left Front

Vehicle from Right Rear

Location of Serial Numbers

Chassis, Type Label, and Key Numbers

Engine and Fork Part Numbers

Shock Absorber Part Number

Controls

Handlebar Controls

Speedometer and Tripmaster Functions

Fuel Tap, Choke, and Starting Aids

Chassis Controls: Stands and Steering Lock

General Tips and Hints on Putting into Operation

Advice on First Use

Engine Break-in and Riding Condition Preparation

Riding Instructions

Pre-Ride Checks and Engine Starting

Riding Techniques, Braking, and Parking

Refueling Safety and Guidelines

Service Schedules

Workshop Maintenance: EXC-F, EXC-F SIX DAYS, XCF-W

Workshop Maintenance: SX-F

Rider Maintenance Tasks

Maintenance Work on Chassis and Engine

Suspension System Adjustment

Wheel, Tire, and Chain Maintenance

Brake System Maintenance and Checks

Fluid Levels and Changes

Air Filter and Carburetor Maintenance

Cleaning

Motorcycle Cleaning Procedures

Storage

Long-Term Storage Preparation

Putting into Operation After Storage

Technical Data

Engine Specifications and Tightening Torques

Chassis, Carburetor, Fork, and Shock Absorber Specifications

Wiring Diagram

Wiring Diagram: EXC-F EU, EXC-F SIX DAYS

Wiring Diagram: EXC-F AUS

Wiring Diagram: XCF-W

Wiring Diagram: SX-F

Substances and Auxiliary Products

Recommended Fluids and Lubricants

Cleaning Agents and Sprays

Standards

JASO T903 MA Standard

SAE Viscosity Classes

Related product manuals