KTM 450 EXC User Manual (English)

Questions and Answers:

C
Courtney SandersAug 15, 2025
What to do if my KTM 450 EXC engine turns but won't start?
- S
  samuel75Aug 15, 2025
  If your KTM Motorcycle engine turns but does not start, consider these potential causes and solutions: * **Operating error:** Review the engine starting steps. * **Old fuel:** If the motorcycle was out of use for a long time, empty the carburetor float chamber. * **Flooded engine:** Clean and dry the spark plug, or replace it if needed. * **Oily or wet spark plug:** Clean and dry the spark plug, or replace it if necessary. * **Incorrect spark plug gap:** Adjust the plug gap to the recommended 0.9 mm (0.035 in).
S
scottserranoAug 18, 2025
Why does my KTM 450 EXC Motorcycle have no power?
- A
  Angel FowlerAug 18, 2025
  If your KTM Motorcycle engine has too little power, it might be due to: * An interrupted fuel feed, so check the fuel tank breather. * A very dirty air filter. * Too little valve clearance, so adjust it.
J
jerrygomezAug 21, 2025
How to fix KTM Motorcycle that won't crank?
- D
  dustin10Aug 21, 2025
  If the KTM Motorcycle engine cannot be cranked (electric starter), it could be due to: * An operating error, so go through the steps of starting the engine. * A discharged battery, so recharge the battery.
G
gallowayscottAug 25, 2025
Why is my KTM 450 EXC Motorcycle using so much oil?
- A
  Anthony GarciaAug 25, 2025
  If your KTM Motorcycle has high oil consumption, check the following: * Ensure the engine vent hose isn't bent; route it without bends or replace it if necessary. * Verify the engine oil level; if it's too high, adjust it.
D
David ParkerAug 27, 2025
Why does my KTM Motorcycle not idle?
- J
  John CarlsonAug 27, 2025
  If your KTM Motorcycle engine has no idle, consider these potential causes: * The idling jet might be blocked, so check/adjust the carburetor components. * The spark plug may be defective, so change it. * The ignition system could be defective, so check the ignition coil, CDI unit, spark plug connector, ignition pulse generator, and the generator.
N
Nicholas JoyceAug 30, 2025
Why KTM 450 EXC engine won't speed up?
- C
  Christopher ThompsonAug 30, 2025
  If the KTM Motorcycle engine does not speed up, consider these possible causes: * Carburetor running over because float needle dirty or worn, so check/adjust the carburetor components. * Loose carburetor jets, so check/adjust the carburetor components. * Defective ignition system, so check the ignition coil, CDI unit, spark plug connector, ignition pulse generator, and the generator.
K
Kyle YoungSep 2, 2025
What to check if KTM Motorcycle battery is not charging?
- X
  xowensSep 2, 2025
  If your KTM Motorcycle battery is discharged because it does not charge, you should check the charging voltage, the charging current and the generator.
D
David ReyesSep 5, 2025
Why does my KTM 450 EXC stall when I give it gas?
- S
  stevenmunozSep 5, 2025
  If the KTM Motorcycle engine stalls or is popping into the carburetor, it may be due to a lack of fuel. Turn the fuel tap handle to the ON position and fill up with fuel.
H
Hannah CruzSep 8, 2025
Why is my KTM 450 EXC engine overheating?
- M
  Melissa OsbornSep 8, 2025
  If your KTM Motorcycle engine overheats, there could be several reasons: * Too little coolant in the cooling system, so check for leakage and the coolant level. * Radiator fins may be very dirty, so clean them. * Foam formation in the cooling system, so drain and refill the coolant. * Bent radiator hose, so replace it. * Defective thermostat, so check it (the guideline opening temperature is 70 °C (158 °F)).
L
Lisa LopezSep 12, 2025
Why did my KTM 450 EXC Motorcycle speedometer reset?
- S
  smithsusanSep 12, 2025
  If the speedometer values (time, stop watch, lap times) are deleted on your KTM Motorcycle, the battery in the speedometer is empty. Change the battery in the speedometer.

KTM 450 EXC Specifications

General

Displacement	449.9 cc
Bore x Stroke	95 mm x 63.4 mm
Compression Ratio	12.75:1
Starter	Electric Starter
Transmission	6-speed
Seat Height	960 mm
Ground Clearance	370 mm
Engine Type	Single Cylinder, 4-Stroke
Cooling	Liquid Cooled
Front Suspension	WP XPLOR USD Forks
Rear Suspension	WP XPLOR Shock with PDS
Front Brake	Single Disc Brake
Rear Brake	220 mm disc
Dry Weight	107 kg
ABS	No

Summary

Safety Advice

General instructions for operating the vehicle safely.

Degrees of Risk and Symbols

Explains risk categories and associated symbols.

Safe Operation

Provides guidance on safe operation and potential hazards.

Protective Clothing

Emphasizes the importance of wearing protective clothing.

Controls

Preparing for Use

Advice on First Use

Provides initial advice and pre-ride checks for new users.

Running-in the Engine

Guides on the proper procedure for running in the engine.

Preparing the Vehicle for Difficult Riding Conditions

Advises on preparing the bike for various tough riding conditions.

Riding Instructions

Checks and Maintenance Work When Preparing for Use

Lists pre-ride checks and maintenance tasks.

Starting

Details the procedure for starting the engine.

Starting Off

Explains how to start moving the motorcycle.

Shifting, Riding

Guides on shifting gears and riding techniques.

Braking

Details proper braking techniques and warnings.

Refueling

Details the correct and safe procedure for refueling.

Service Schedule

Lists maintenance tasks at different intervals.

Tuning the Chassis

Checking the Basic Suspension Setting Against the Rider's Weight

Explains how to adjust suspension for rider weight.

Adjusting the Low-Speed Compression Damping of the Shock Absorber

Details how to adjust low-speed compression damping.

Adjusting the High-Speed Compression Damping of the Shock Absorber

Details how to adjust high-speed compression damping.

Adjusting the Rebound Damping of the Shock Absorber

Details how to adjust rebound damping.

Adjusting the Spring Preload of the Shock Absorber

Details how to adjust the shock absorber spring preload.

Adjusting the Riding Sag

Guides on how to adjust the riding sag of the shock absorber.

Adjusting the Compression Damping of the Fork

Details how to adjust fork compression damping.

Adjusting the Rebound Damping of the Fork

Details how to adjust fork rebound damping.

Adjusting the Spring Preload of the Fork (EXC EU/AU, XC-W)

Details how to adjust fork spring preload.

Adjusting the Spring Preload of the Fork (EXC Six Days)

Details how to adjust fork spring preload for EXC Six Days.

Service Work on the Chassis

Bleeding the Fork Legs

Details the procedure for bleeding fork legs.

Removing the Fork Legs

Details the procedure for removing the fork legs.

Installing the Fork Legs

Details the procedure for installing the fork legs.

Removing the Lower Triple Clamp (All EXC Models)

Details removal of the lower triple clamp.

Removing the Lower Triple Clamp (XC-W)

Details removal of the lower triple clamp for XC-W.

Installing the Lower Triple Clamp (All EXC Models)

Details installation of the lower triple clamp.

Installing the Lower Triple Clamp (XC-W)

Details installation of the lower triple clamp for XC-W.

Checking the Steering Head Bearing Play

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

Adjusting the Play of the Steering Head Bearing (All EXC Models)

Details how to adjust steering head bearing play.

Adjusting the Play of the Steering Head Bearing (XC-W)

Details how to adjust steering head bearing play for XC-W.

Removing the Shock Absorber

Details the procedure for removing the shock absorber.

Installing the Shock Absorber

Details the procedure for installing the shock absorber.

Removing the Fuel Tank

Details the procedure for removing the fuel tank.

Installing the Fuel Tank

Details the procedure for installing the fuel tank.

Checking the Chain Tension

Explains how to check the chain tension.

Adjusting the Chain Tension

Details how to adjust the chain tension.

Checking/Correcting the Fluid Level of the Hydraulic Clutch

Explains how to check and correct hydraulic clutch fluid level.

Changing the Hydraulic Clutch Fluid

Details the procedure for changing hydraulic clutch fluid.

Brake System

Adjusting Free Travel of Hand Brake Lever (All EXC Models)

Guides on adjusting hand brake lever free travel.

Checking the Brake Fluid Level of the Front Brake

Explains how to check front brake fluid level.

Adding Front Brake Fluid

Details the procedure for adding front brake fluid.

Checking the Front Brake Linings

Explains how to check front brake lining thickness.

Changing the Front Brake Linings

Details the procedure for changing front brake linings.

Checking the Rear Brake Fluid Level

Explains how to check rear brake fluid level.

Adding Rear Brake Fluid

Details the procedure for adding rear brake fluid.

Checking the Rear Brake Linings

Explains how to check rear brake lining thickness.

Changing the Rear Brake Linings

Details the procedure for changing rear brake linings.

Wheels, Tires

Removing the Front Wheel

Details the procedure for removing the front wheel.

Installing the Front Wheel

Details the procedure for installing the front wheel.

Removing the Rear Wheel

Details the procedure for removing the rear wheel.

Installing the Rear Wheel

Details the procedure for installing the rear wheel.

Electrical System

Cooling System

Checking the Antifreeze and Coolant Level

Explains how to check coolant and antifreeze levels.

Checking the Coolant Level

Explains how to check the coolant level in the radiator.

Draining the Coolant

Details the procedure for draining the coolant.

Refilling Coolant

Details the procedure for refilling the coolant.

Tuning the Engine

Service Work on the Engine

Checking the Engine Oil Level

Explains how to check the engine oil level.

Changing the Engine Oil and Oil Filter, Cleaning the Oil Screens

Details how to change engine oil, filter, and clean screens.

Adding Engine Oil

Cleaning, Care

Storage

Troubleshooting

Technical Data

Engine

Lists technical specifications for the engine.

Engine Tightening Torques

Lists torque specifications for engine components.

Chassis

Lists technical specifications for the chassis.

Fork

Lists specifications for the front fork.

Shock Absorber

Lists specifications for the rear shock absorber.

Chassis Tightening Torques

Lists torque values for chassis fasteners.

Substances

Related product manuals

KTM 450 EXC SIX DAYS EU

16 pages

KTM 450 EXC SIX DAYS EU 2011

272 pages

KTM 2013 450 EXC SIX DAYS EU

124 pages

KTM 450 EXC User Manual

Table of Contents

Questions and Answers:

KTM 450 EXC Specifications

Summary

Safety Advice

Safety Advice

Degrees of Risk and Symbols

Safe Operation

Protective Clothing

Controls

Preparing for Use

Advice on First Use

Running-in the Engine

Preparing the Vehicle for Difficult Riding Conditions

Riding Instructions

Checks and Maintenance Work When Preparing for Use

Starting

Starting Off

Shifting, Riding

Braking

Refueling

Service Schedule

Service Schedule

Tuning the Chassis

Checking the Basic Suspension Setting Against the Rider's Weight

Adjusting the Low-Speed Compression Damping of the Shock Absorber

Adjusting the High-Speed Compression Damping of the Shock Absorber

Adjusting the Rebound Damping of the Shock Absorber

Adjusting the Spring Preload of the Shock Absorber

Adjusting the Riding Sag

Adjusting the Compression Damping of the Fork

Adjusting the Rebound Damping of the Fork

Adjusting the Spring Preload of the Fork (EXC EU/AU, XC-W)

Adjusting the Spring Preload of the Fork (EXC Six Days)

Service Work on the Chassis

Bleeding the Fork Legs

Removing the Fork Legs

Installing the Fork Legs

Removing the Lower Triple Clamp (All EXC Models)

Removing the Lower Triple Clamp (XC-W)

Installing the Lower Triple Clamp (All EXC Models)

Installing the Lower Triple Clamp (XC-W)

Checking the Steering Head Bearing Play

Adjusting the Play of the Steering Head Bearing (All EXC Models)

Adjusting the Play of the Steering Head Bearing (XC-W)

Removing the Shock Absorber

Installing the Shock Absorber

Removing the Fuel Tank

Installing the Fuel Tank

Checking the Chain Tension

Adjusting the Chain Tension

Checking/Correcting the Fluid Level of the Hydraulic Clutch

Changing the Hydraulic Clutch Fluid

Brake System

Adjusting Free Travel of Hand Brake Lever (All EXC Models)

Checking the Brake Fluid Level of the Front Brake

Adding Front Brake Fluid

Checking the Front Brake Linings

Changing the Front Brake Linings

Checking the Rear Brake Fluid Level

Adding Rear Brake Fluid

Checking the Rear Brake Linings

Changing the Rear Brake Linings

Wheels, Tires

Removing the Front Wheel

Installing the Front Wheel

Removing the Rear Wheel

Installing the Rear Wheel

Electrical System

Cooling System

Checking the Antifreeze and Coolant Level

Checking the Coolant Level

Draining the Coolant

Refilling Coolant

Tuning the Engine

Service Work on the Engine

Checking the Engine Oil Level

Changing the Engine Oil and Oil Filter, Cleaning the Oil Screens

Adding Engine Oil