KTM 250 SX-F 2021 User Manual

OWNER'S MANUAL 2021
250 SX-F
250 XC‑F
250 SX‑F TROY LEE DESIGNS
Art. no. 3214213en

KTM 250 SX-F 2021 Specifications

General

Engine Type	1-cylinder, 4-stroke engine
Displacement	249.9 cm³
Bore x Stroke	78 mm x 52.3 mm
Starter	Electric starter
Transmission	5-speed
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
Seat Height	950 mm
Weight (without fuel)	99 kg
Ignition	Keihin EMS
Final Drive	Chain
Tank Capacity	7 liters
Fuel System	Keihin EFI, 44mm throttle body
Frame Design	Central double-cradle type 25CrMo4 steel

Summary

SAFETY ADVICE

Safety advice

Provides general instructions for safe operation and highlights the importance of warning labels.

Degrees of risk and symbols

Explains danger, warning, caution, and note symbols and their associated risk levels.

Safe operation

Provides critical safety instructions regarding rider fitness and exhaust gas hazards.

Protective clothing

Emphasizes the importance of wearing appropriate protective clothing for all rides.

CONTROLS

Combination switch

Explains the function of the combination switch for engine mapping and controls.

Opening the fuel tank filler cap

Provides safety warnings and instructions for opening the fuel tank cap.

PREPARING FOR USE

Advice on preparing for first use

Provides essential advice and warnings before the first ride, including safety and controls.

Running in the engine

Advises on proper engine break-in procedures and operational limits.

Preparing the vehicle for difficult operating conditions

Details preparations for riding in challenging conditions like sand, mud, or extreme temperatures.

RIDING INSTRUCTIONS

Checks and maintenance measures when preparing for use

Lists essential pre-ride checks and maintenance tasks for ensuring operational safety.

Starting the vehicle

Explains the procedure and safety precautions for starting the engine.

Activating launch control

Describes how to activate launch control for optimal acceleration from a standstill.

Activating traction control

Explains how to engage and use the traction control system for improved grip.

Starting off

Guides on how to start moving from a standstill, including clutch and throttle use.

Shifting, riding

Provides instructions on proper gear shifting and riding techniques.

Applying the brakes

Advises on proper braking techniques and potential hazards.

Stopping, parking

Details procedures and safety precautions for stopping and parking the motorcycle.

Refueling

Provides safety instructions and procedures for refueling the vehicle.

SERVICE SCHEDULE

Required work

Lists maintenance tasks to be performed at specified operating hour or time intervals.

Recommended work

Lists recommended maintenance tasks beyond essential requirements.

TUNING THE CHASSIS

Checking the basic chassis setting with rider's weight

Explains how to adjust suspension components based on rider weight.

Adjusting the low-speed compression damping of the shock absorber

Details how to adjust the low-speed compression damping of the rear shock absorber.

Adjusting the high-speed compression damping of the shock absorber

Provides instructions for adjusting the high-speed compression damping of the rear shock absorber.

Adjusting the rebound damping of the shock absorber

Explains how to adjust the rebound damping of the rear shock absorber.

Checking the static sag of the shock absorber

Guides on how to check the static sag of the rear shock absorber.

Checking the riding sag of the shock absorber

Explains how to check the riding sag of the rear shock absorber.

Adjusting the spring preload of the shock absorber

Provides instructions for adjusting the shock absorber spring preload.

Adjusting the riding sag

Details the process for adjusting the riding sag of the rear shock absorber.

Adjusting the fork air pressure

Guides on how to adjust the air pressure in the front fork.

Adjusting the compression damping of the fork

Explains how to adjust the compression damping of the front fork.

Adjusting the rebound damping of the fork

Details how to adjust the rebound damping of the front fork.

SERVICE WORK ON THE CHASSIS

Removing the fork legs

Provides step-by-step instructions for removing the front fork legs.

Installing the fork legs

Details the procedure for installing the front fork legs.

Removing the lower triple clamp

Guides on how to remove the lower triple clamp assembly.

Installing the lower triple clamp

Details the procedure for installing the lower triple clamp.

Checking the steering head bearing play

Explains how to check for play in the steering head bearing.

Adjusting the steering head bearing play

Guides on how to adjust the steering head bearing play.

Removing the shock absorber

Installing the shock absorber

Removing the seat

Mounting the seat

Removing the air filter

Cleaning the air filter and air filter box

Installing the air filter

Removing the main silencer

Installing the main silencer

Removing the fuel tank

Installing the fuel tank

Cleaning the chain

Checking the chain tension

Adjusting the chain tension

Checking the chain, rear sprocket, engine sprocket, and chain guide

Checking the frame

Checking the link fork

Adjusting the basic position of the clutch lever

Checking/correcting the fluid level of the hydraulic clutch

Changing the hydraulic clutch fluid

BRAKE SYSTEM

Checking the free travel of the hand brake lever

Adjusting the basic position of the hand brake lever

Checking the brake discs

Checking the front brake fluid level

Checking the front brake linings

Changing the brake linings of the front brake

Checking the free travel of foot brake lever

Adjusting the basic position of the foot brake lever

Checking the rear brake fluid level

Adding rear brake fluid

Checking the brake linings of the rear brake

WHEELS, TIRES

Removing the front wheel

Installing the front wheel

Removing the rear wheel

Installing the rear wheel

Checking the tire condition

Checking tire pressure

Details how to check and set tire pressure.

ELECTRICAL SYSTEM

Removing the 12-V battery

Installing the 12-V battery

Charging the 12-V battery

Changing main fuse

COOLING SYSTEM

Checking the antifreeze and coolant level

Checking the coolant level

Draining the coolant

Refilling with coolant

Changing the coolant

TUNING THE ENGINE

Checking the play in the throttle cable

Adjusting the play in the throttle cable

Adjusting the characteristic map of the throttle response

Changing the mapping

Adjusting the idle speed

Programming the throttle valve position

Checking the basic position of the shift lever

Adjusting the basic position of the shift lever

SERVICE WORK ON THE ENGINE

Changing the fuel screen

Checking the engine oil level

Details how to check the engine oil level when cold or warm.

Changing the engine oil and oil filter, cleaning the oil screen

Guides on changing engine oil, filter, and cleaning the oil screen.

TROUBLESHOOTING

TECHNICAL DATA

Engine tightening torques

Provides a list of tightening torques for engine components.

Chassis tightening torques

Provides a list of tightening torques for chassis components.