What causes a KTM 250 SX-F engine not to rev up?
If your KTM Motorcycle engine does not rev up, it could be due to the carburetor fuel level being too high because the float needle valve is dirty or worn out, loose carburetor jets, or faulty electronic ignition timing. Dismount the carburetor and check if it is worn out. Tighten the jets and have the ignition system checked.
Why does my KTM Motorcycle have high oil consumption?
High oil consumption in your KTM Motorcycle could be due to a bent engine ventilation hose, an engine oil level that's too high, or motor oil that is too thin. Replace the ventilation hose if it's buckled. Check the engine oil level and correct it if necessary. Use a thicker engine oil, referring to the “Engine oil“ chapter for guidance.
General| Displacement | 249.9 cm³ |
|---|---|
| Bore x Stroke | 78 mm x 52.3 mm |
| Starter | Electric starter |
| Transmission | 5-speed |
| Cooling | Liquid cooled |
| Front Suspension | WP XACT-USD, Ø 48 mm |
| Rear Suspension | WP XACT Monoshock with linkage |
| Front Brake | Disc brake |
| Rear Brake | Disc brake |
| Ground Clearance | 370 mm |
| Compression Ratio | 14.4:1 |
| Engine Type | Single Cylinder, 4-Stroke |
| Fuel System | Keihin EFI, 44mm Throttle Body |
| Frame | Central double-cradle type 25CrMo4 steel |
| Fuel Tank Capacity | 7.2 liters |
Explains the meaning of various symbols used in the manual.
Describes the typographical formats used in the document.
Defines the intended use of the vehicle for competitive use.
Explains dangers arising from using the vehicle not as intended.
General guidance on following safety instructions in the manual.
Defines danger, warning, caution, and note symbols.
Warns against tampering with the noise control system.
Covers dangers of accidents and poisoning during operation.
Emphasizes the importance of wearing appropriate protective clothing.
Outlines rules for performing work, including special tools and parts.
Advises on responsible use and disposal of fluids and components.
Stresses the importance of reading and keeping the manual.
Details warranty coverage and conditions, requiring authorized workshops.
Advises on using correct substances and environmental hazards.
Recommends using approved KTM parts and accessories for safety.
Stresses proper service for perfect operation and wear prevention.
Notes that figures may depict special equipment and show parts disassembled.
Directs users to authorized dealers for questions.
Illustrates and labels components on the front left view of the vehicle.
Illustrates and labels components on the rear right view of the vehicle.
Explains the location of the chassis number stamped on the steering head.
Indicates the location of the type label on the front of the steering head.
Shows the location of the engine number on the left side of the engine.
Explains the location of the fork article number on the axle clamp.
Details the location of the shock absorber article number.
Describes the clutch lever on the left handlebar and its operation.
Explains the hand brake lever on the right handlebar for the front brake.
Locates the throttle grip on the right side of the handlebar.
Explains the function and states of the kill switch on the left handlebar.
Locates and describes the electric starter button on the right handlebar.
Details the combination switch on the left handlebar for mapping and controls.
Lists and explains the meaning of various indicator lamps on the vehicle.
Explains the function of the service hour counter on the handlebar.
Provides safety warnings and steps for opening the fuel filler cap.
Details the procedure for closing the fuel filler cap securely.
Explains the function and operation of the cold start button.
Describes the idle speed adjusting screw and its effect.
Locates the shift lever and shows gear positions for different models.
Locates the foot brake lever for activating the rear brake.
Explains the function and use of the plug-in stand.
Locates and describes the use of the side stand.
Covers crucial safety advice and checks before the first ride.
Provides guidelines for the engine running-in phase.
Explains battery performance and starting at low temperatures.
Advises on preparing the vehicle for various challenging conditions.
Details specific preparations for riding on dry sand.
Details specific preparations for riding on wet sand.
Details preparations for riding on wet and muddy circuits.
Advises on preparations for high temperatures or slow riding.
Details preparations for riding in low temperatures or snow.
Lists essential checks before every trip for safe operation.
Provides instructions and safety warnings for starting the engine.
Explains how to activate launch control for optimal race starts.
Describes how to activate traction control for enhanced control.
Details the procedure for smoothly starting the motorcycle from a standstill.
Guides on proper gear shifting techniques and riding practices.
Advises on correct brake application and potential issues.
Covers safe procedures for stopping and parking the vehicle.
Provides notes on safe transport of the motorcycle.
Includes safety warnings and instructions for refueling the vehicle.
Notes on service work, intervals, and local conditions.
Lists mandatory maintenance tasks based on operating hours or races.
Lists recommended maintenance tasks for optimal longevity.
Explains how to adjust chassis settings based on rider weight.
Describes the WP AER 48 air suspension system in the fork.
Explains high-speed and low-speed compression damping.
Details how to adjust the low-speed compression damping of the shock absorber.
Details how to adjust the high-speed compression damping of the shock absorber.
Details how to adjust the rebound damping of the shock absorber.
Provides steps to measure rear wheel sag with the motorcycle unloaded.
Explains how to check the static sag of the shock absorber.
Explains how to check the riding sag of the shock absorber.
Details how to adjust the spring preload of the shock absorber.
Explains how to check the basic fork setting and air pressure.
Details how to adjust the air pressure in the fork suspension.
Details how to adjust the compression damping of the fork.
Details how to adjust the rebound damping of the fork.
Describes how to adjust the handlebar position for comfort.
Provides instructions for adjusting the handlebar position.
Explains how to safely raise the motorcycle using a lift stand.
Details how to safely remove the motorcycle from the lift stand.
Provides steps for bleeding the fork legs.
Explains how to clean the dust boots of the fork legs to prevent leaks.
Details the process for removing the fork protector.
Details the process for installing the fork protector.
Provides steps to remove the fork legs.
Provides steps to install the fork legs.
Details the process for removing the lower triple clamp.
Details the process for installing the lower triple clamp.
Explains how to check for play in the steering head bearing.
Details how to adjust the steering head bearing play.
Explains the lubrication of the steering head bearing.
Provides steps to remove the start number plate.
Provides steps to install the start number plate.
Details the process for removing the front fender.
Details the process for installing the front fender.
Provides steps to remove the shock absorber.
Provides steps to install the shock absorber.
Details the process for removing the seat.
Details the process for mounting the seat.
Provides steps to remove the air filter box cover.
Provides steps to install the air filter box cover.
Details the process for removing the air filter.
Explains how to clean the air filter and its box.
Provides steps to install the air filter.
Details how to prepare the air filter box cover for securing.
Provides safety warning and steps to remove the main silencer.
Provides steps to install the main silencer.
Explains how to change the glass fiber yarn filling in the main silencer.
Provides safety warnings and steps to remove the fuel tank.
Provides safety warnings and steps to install the fuel tank.
Explains how to check the chain for dirt accumulation.
Provides instructions and warnings for cleaning the chain.
Explains how to check the chain tension and its importance.
Details how to adjust the chain tension correctly.
Explains how to check wear on the chain drive components.
Guides on checking the frame for cracks and deformation.
Guides on checking the swingarm for damage and deformation.
Explains how to check the correct routing of throttle cables.
Details how to check the handlebar rubber grips for wear and damage.
Explains how to adjust the clutch lever position for hand size.
Covers checking and correcting the hydraulic clutch fluid level.
Provides steps and warnings for changing the hydraulic clutch fluid.
Explains how to check the free travel of the hand brake lever.
Details how to adjust the hand brake lever position.
Guides on checking brake discs for wear and damage.
Explains how to check the front brake fluid level.
Provides instructions and warnings for adding front brake fluid.
Guides on checking the minimum thickness of front brake linings.
Details how to change the front brake linings.
Explains how to check the free travel of the foot brake lever.
Details how to adjust the basic position of the foot brake lever.
Explains how to check the rear brake fluid level.
Provides instructions and warnings for adding rear brake fluid.
Guides on checking the minimum thickness of rear brake linings.
Details how to change the rear brake linings.
Provides steps and warnings for removing the front wheel.
Provides steps and warnings for installing the front wheel.
Provides steps and warnings for removing the rear wheel.
Provides steps and warnings for installing the rear wheel.
Advises on checking tire condition, age, and type for safety.
Explains how to check and correct tire air pressure.
Guides on checking and correcting spoke tension for wheel integrity.
Details steps and warnings for removing the battery.
Details steps for installing the battery correctly.
Provides instructions and warnings for recharging the battery.
Explains how to locate and change the main fuse.
Describes the basic function of the cooling system and its components.
Explains how to check antifreeze and coolant levels with safety warnings.
Details how to check the coolant level in the radiator.
Provides safety warnings and steps for draining the coolant.
Details steps and warnings for refilling the coolant.
Provides safety warnings and steps for changing the coolant.
Explains how to check the throttle cable play.
Details how to adjust the play in the throttle cable.
Explains how to change the throttle response map via the guide plate.
Describes how to select different engine mapping modes.
Provides instructions and warnings for adjusting the idle speed.
Explains the procedure for teaching the throttle valve position.
Explains how to check the shift lever's basic position.
Details how to adjust the shift lever's basic position.
Provides steps and safety warnings for changing the fuel screen.
Explains how to check the engine oil level when cold or warm.
Details the process for changing engine oil, filter, and cleaning the oil screen.
Provides instructions for adding engine oil and warnings.
Offers guidelines and warnings for cleaning the motorcycle safely.
Outlines steps for long-term storage and safety precautions.
Provides steps for bringing the motorcycle back into use after storage.
Provides detailed technical specifications for the engine.
Lists specific torque values for engine components.
Lists capacities for engine oil, coolant, and fuel.
Provides technical data related to the chassis, frame, and suspension.
Lists technical data for the electrical system components.
Specifies tire sizes and validity for different models.
Provides technical data for the fork suspension, including settings.
Provides technical data for the shock absorber, including settings.
Lists specific torque values for chassis components.
Specifies standards and recommended suppliers for brake fluid.
Advises on coolant types, antifreeze protection, and recommended suppliers.
Specifies standards and recommended suppliers for engine oil.
Specifies standards and recommended suppliers for fork oil.
Specifies standards and recommended suppliers for shock absorber fluid.
Specifies fuel grade requirements and warnings about additives.
Lists recommended suppliers for air filter cleaner.
Lists recommended suppliers for chain cleaner.
Lists recommended suppliers for fuel additive.
Lists recommended suppliers for high viscosity grease.
Lists recommended suppliers for long-life grease.
Lists recommended suppliers for motorcycle cleaner.
Lists recommended suppliers for multi-purpose grease.
Lists recommended suppliers for off-road chain spray.
Lists recommended suppliers for oil for foam air filters.
Lists recommended suppliers for preserving materials.
Lists recommended suppliers for special surface cleaners.
Lists recommended suppliers for universal oil spray.
Explains the JASO T903 MA2 standard for motorcycle oils.
Explains SAE viscosity classes for oil classification.
Defines launch control as an electronic function for acceleration.
Defines OBD as an on-board diagnostic system.
Explains the meaning of yellow and orange symbols for errors and aids.
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