KTM 400 EXC RACING 2006 User Manual (English)

Questions and Answers:

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mrodriguezAug 14, 2025
Why does my KTM Motorcycle engine get too hot?
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  Matthew HarrisAug 14, 2025
  If your KTM Motorcycle engine is overheating, several factors could be the cause. First, check and refill the cooling liquid, also inspect the cooling system for any leaks. Ensure there's adequate airflow while riding; consider retrofitting an electric fan if needed. Make sure the cooling system is properly bled and the radiators are clean. If foam is present in the cooling system, replace the coolant with a brand-name antifreeze liquid. Inspect cooling hoses for bends and replace if necessary. Check the thermostat for proper operation (opening temperature 70°C or 158°F). If you have an XC Desert model, check and replace the fan fuse if blown.
I
isanchezAug 17, 2025
Why my KTM 400 EXC RACING 2006 Motorcycle engine will not reach full power?
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  Amy Owen DDSAug 17, 2025
  If your KTM Motorcycle isn't reaching its full power, start by checking the fuel system and carburetor for dirt or blockages, and clean them if necessary. Replace the float if it leaks. Ensure the air filter is clean; if it's very dirty, clean or replace it. Inspect the exhaust system for damage and ensure it's tight; replace the glass fiber yarn in the exhaust silencer if needed. Also, check and adjust the valve gap. Finally, check the setting of the hand decompression cable.
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Jennifer PriceAug 25, 2025
How to fix KTM 400 EXC RACING 2006 Motorcycle when engine doesn’t crank?
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  dfrostAug 25, 2025
  If your KTM Motorcycle engine doesn't crank with the E-starter, the issue might be a blown fuse. To resolve this, dismount the left paneling and the filter box cover and replace the fuse in the starter relay. Another possibility is a discharged battery; recharge it and investigate the causes of the discharge. Also, ensure the emergency-OFF switch is turned on (Australia only).
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Jessica HunterAug 27, 2025
What causes a KTM 400 EXC RACING 2006 engine to fail to idle?
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  jasonkennedyAug 27, 2025
  If your KTM Motorcycle engine fails to idle, the problem could be a clogged idling jet. Disassemble the carburetor and clean the jets. Also, the spark plug may be defective and require replacement.
H
hannahbensonAug 31, 2025
What to do if KTM 400 EXC RACING 2006 engine stops or splutters in carburetor?
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  Tasha TownsendAug 31, 2025
  If your KTM Motorcycle engine stops or sputters in the carburetor, it could be due to insufficient fuel. Clean and check the fuel system and carburetor. Also, check the rubber sleeve and carburetor for a tight fit, as the engine might be taking in air uncontrollably.
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Alicia ToddSep 2, 2025
Why does my KTM Motorcycle have high oil consumption?
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  josephtanyaSep 2, 2025
  If your KTM Motorcycle has high oil consumption, check if the hose of the engine ventilation is bent. If it is, dislocate or replace it with a non-buckling ventilation hose. Also, check the engine oil level and correct it if it's too high. If the motor oil is too thin, use a thicker engine oil.
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Christina BrowningSep 6, 2025
What to do if horn, flasher lights and E-starter do not work on KTM Motorcycle?
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  Christy ChanSep 6, 2025
  If the horn, flasher lights, and E-starter on your KTM Motorcycle aren't working, it may be due to a blown fuse in the starter relay. To fix this, dismount the left side paneling and filter box cover, then replace the fuse.
C
Christopher Fletcher IVSep 9, 2025
Why KTM Motorcycle engine does not rev high?
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  jeffrey92Sep 9, 2025
  If your KTM Motorcycle engine does not rev high, the carburetor fuel level might be too high because the float needle valve is dirty or worn out. Dismount the carburetor and check if it's worn out. Also, tighten the jets.

KTM 400 EXC RACING 2006 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	398 cc
Compression Ratio	11.8:1
Ignition	Kokusan digital
Cooling System	Liquid cooled
Transmission	6-speed
Rear Suspension	WP PDS shock absorber
Front Tire	90/90-21
Rear Tire	140/80-18
Seat Height	925 mm
Dry Weight	112 kg
Front Suspension	USD forks, 48 mm
Front Brake	Single disc, 260 mm
Rear Brake	Single disc, 220 mm
Wheelbase	1475 mm
Starter	Electric starter
Power Output	40 hp
Bore x Stroke	89 x 64 mm