KTM 400 EXC EU User Manual (English)

Other manuals for KTM 400 EXC EU

Questions and Answers:

J
james75Aug 19, 2025
What causes a KTM 400 EXC EU engine not to speed up?
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  Michael TorresAug 19, 2025
  If the KTM Motorcycle engine does not speed up, here are a few potential causes: * The carburetor might be running over because the float needle is dirty or worn; check/adjust the carburetor components. * Loose carburetor jets can also cause this issue; check/adjust the carburetor components. * A defective ignition system can prevent the engine from speeding up; check the ignition coil, CDI unit, spark plug connector, ignition pulse generator, and the generator.
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zgambleAug 22, 2025
What to do if the KTM 400 EXC EU engine cannot be cranked (electric starter)?
- S
  sarah33Aug 22, 2025
  If the KTM Motorcycle engine cannot be cranked using the electric starter, there might be several reasons: * It could be due to an operating error, so review the engine starting steps. * The battery might be discharged, requiring you to recharge it. Also, check the charging voltage, closed current and the generator. * A blown fuse could be the culprit; in this case, remove and reinstall the fuse. * The starter relay or starter motor might be defective, necessitating a check.
C
Caitlin PorterAug 28, 2025
Why does my KTM 400 EXC EU engine have too little power?
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  Samuel DaltonAug 28, 2025
  If your KTM Motorcycle engine has too little power, the following could be the causes: * A fuel feed interruption might be the issue; check the fuel tank breather, clean the fuel tap, and check/adjust the carburetor components. * A very dirty air filter can restrict airflow; clean the air filter. * A leaky or deformed exhaust system, or too little glass fiber yarn filling in the main silencer, can reduce power; check the exhaust system for damage and consider changing the glass fiber yarn filling of the main silencer. * Too little valve clearance can also affect power; adjust the valve clearance. * A defective ignition system can cause power loss; check the ignition coil, CDI unit, spark plug connector, ignition pulse generator, and the generator.
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Jonathan ScottAug 31, 2025
Why KTM 400 EXC EU Motorcycle engine has no idle?
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  Misty ThompsonAug 31, 2025
  If the KTM Motorcycle engine has no idle, consider the following potential causes: * The idling jet might be blocked; check/adjust the carburetor components. * The adjusting screws on the carburetor could be distorted; adjust the idle speed of the carburetor. * A defective spark plug can cause idling issues; replace the spark plug. * A defective ignition system can also prevent proper idling; check the ignition coil, CDI unit, spark plug connector, ignition pulse generator, and the generator.
K
Kelly GardnerSep 3, 2025
What to do if KTM Motorcycle engine stalls or is popping into the carburetor?
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  Patricia TravisSep 3, 2025
  If the KTM Motorcycle engine stalls or pops into the carburetor, it could be due to: * Lack of fuel; turn the handle of the fuel tap to the ON position and fill up with fuel. * The engine taking in bad air; check rubber sleeves and carburetor for tightness.
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Aaron ScottSep 6, 2025
What causes high oil consumption in a KTM 400 EXC EU Motorcycle?
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  Danny Roberts MDSep 6, 2025
  High oil consumption in your KTM Motorcycle can be attributed to several factors: * A bent engine vent hose; route the vent hose without bends or replace it if necessary. * An engine oil level that is too high; check the engine oil level. * Engine oil that is too thin (low viscosity); change the engine oil and oil filter and clean the engine oil screen. * A worn piston or cylinder; determine the mounting clearance of the piston/cylinder.
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Joshua JohnsonSep 9, 2025
Why is my KTM 400 EXC EU battery discharged?
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  Bonnie JonesSep 9, 2025
  If the battery of your KTM Motorcycle is discharged, it might be because: * The battery is not charging; check the charging voltage, charging current and the generator. * There is an undesired power consumer; check the closed current.
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Adrienne SanchezSep 12, 2025
Why are my KTM Motorcycle speedometer values deleted?
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  Jonathan AlexanderSep 12, 2025
  If the speedometer values (time, stop watch, lap times) are deleted on your KTM Motorcycle, it is likely because the battery in the speedometer is empty. Replace the battery in the speedometer.

KTM 400 EXC EU Specifications

General

Cooling	Liquid cooled
Transmission	6-speed
Front Brake	Disc brake
Rear Brake	Disc brake
Bore x Stroke	89 mm x 64 mm
Starter	Electric starter
Ground Clearance	355 mm
ABS	No
Engine Type	Single-cylinder, 4-stroke
Displacement	398.6 cc
Fuel System	Keihin carburetor
Front Suspension	WP USD forks
Rear Suspension	WP shock absorber
Fuel Tank Capacity	8.5 l
Frame	Central double-cradle type 25CrMo4 steel