KTM 150 SX 2010 User Manual (English)

Questions and Answers:

I
Ian PhelpsAug 22, 2025
What to do if KTM 150 SX 2010 Motorcycle engine does not speed up?
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  David PorterAug 23, 2025
  If your KTM Motorcycle engine does not speed up, it could be due to a few reasons. One possibility is that the carburetor is running over because the float needle is dirty or worn, in which case you should check/set the carburetor components. Another reason might be loose carburetor jets, so check/set the carburetor components. Finally, a fault in the ignition system could also be the cause, requiring you to check the ignition system.
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Catherine GayAug 25, 2025
Why does my KTM 150 SX 2010 engine have too little power?
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  Cynthia DunnAug 25, 2025
  If your KTM Motorcycle engine has too little power, the possible causes are: the fuel feed is interrupted, the air filter is very dirty, the exhaust system is leaky or deformed, there is too little glass fiber yarn filling in the main silencer, there is a fault in the ignition system, or the diaphragm or reed valve housing is damaged. To solve this, check the fuel tank breather, clean the fuel tap, and check/set the carburetor components. Clean the air filter. Inspect the exhaust system for damage and replace the glass fiber yarn filling of the main silencer. Check the ignition system. Finally, inspect the diaphragm and reed valve housing.
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Erica ReedAug 26, 2025
Why is my KTM Motorcycle engine overheating?
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  Douglas WhiteAug 27, 2025
  If your KTM Motorcycle engine is overheating, the problem could be caused by several factors. The radiator fins may be very dirty, or there could be foam formation in the cooling system. A damaged cylinder head or cylinder head gasket, a bent radiator hose, or an incorrect ignition point due to a loose stator could also be responsible. To address these issues, clean the radiator fins. If there's foam in the cooling system, drain and refill it with coolant. Inspect the cylinder head and cylinder head gasket for damage. Replace any bent radiator hoses and adjust the ignition if the stator is loose.
L
lance11Aug 28, 2025
How to fix KTM 150 SX 2010 engine that does not speed up?
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  Kevin WilliamsAug 28, 2025
  If your KTM Motorcycle engine does not speed up, it could be due to a carburetor running over because the float needle is dirty or worn, loose carburetor jets, or a fault in the ignition system. To resolve this, check and set the carburetor components and inspect the ignition system.
M
Mark GatesAug 29, 2025
Why is gear oil exiting at the vent hose of my KTM 150 SX 2010?
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  Gregory PotterAug 29, 2025
  If gear oil is exiting at the vent hose of your KTM Motorcycle, it is likely because too much gear oil was added. Check the gear oil level.
K
Kaitlyn RichmondAug 31, 2025
Why is there water in the gear oil of my KTM 150 SX 2010 Motorcycle?
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  Eric DyerAug 31, 2025
  If there's water in the gear oil of your KTM Motorcycle, it could be due to a damaged shaft seal ring or water pump. You should check the shaft seal ring and water pump.
H
hintonbrandonSep 2, 2025
Why does my KTM 150 SX 2010 Motorcycle engine have so little power?
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  diane01Sep 2, 2025
  If your KTM Motorcycle engine has too little power, the issue could stem from several causes. A potential reason is an interrupted fuel feed, so check the fuel tank breather, clean the fuel tap, and inspect/set the carburetor components. A very dirty air filter can also restrict power, so clean the air filter. Inspect the exhaust system for leaks or deformation and replace the glass fiber yarn filling in the main silencer if it's insufficient. A fault in the ignition system could also be the culprit, requiring a check of the ignition system. Finally, inspect the diaphragm and reed valve housing for any damage.
E
Elizabeth SilvaSep 4, 2025
What to do if KTM 150 SX 2010 Motorcycle engine stalls or pops in carburetor?
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  Beverly AndersonSep 4, 2025
  If your KTM Motorcycle engine stalls or pops into the carburetor, it could be due to several reasons. First, ensure the fuel tap is in the ON position and refuel if the tank is low. Also, check the intake flange and carburetor for tightness, as the engine might be taking in bad air. Clean any loose or oxidized socket connectors or the ignition coil, and treat them with contact spray. Finally, check the cooling system for leakage and ensure the coolant level is adequate.
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michellejohnsonSep 5, 2025
How to fix KTM Motorcycle engine overheating?
- A
  aellisSep 5, 2025
  If your KTM Motorcycle engine is overheating, start by cleaning the radiator fins, as they might be very dirty. If there's foam formation in the cooling system, drain the coolant and refill it. Inspect the cylinder head and cylinder head gasket for damage. Check for any bent radiator hoses and replace them if necessary. Lastly, adjust the ignition if the incorrect ignition point is due to a loose stator.
D
Donald WarnerSep 7, 2025
Why KTM Motorcycle engine has no idle?
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  Matthew BowmanSep 8, 2025
  If your KTM Motorcycle engine has no idle, the possible reasons are the following: * Idling jet blocked, so you should check/set the carburetor components. * Adjusting screws on carburetor distorted, so you should adjust the idle speed. * Spark plug defective, so you should change the spark plug. * Ignition system defective, so you should check the ignition coil and the spark plug connector.

KTM 150 SX 2010 Specifications

General

Starter	Kickstarter
Transmission	6-speed
Front Suspension	WP USD 48 mm
Fuel Capacity	7.5 L
Engine Type	Single-cylinder, two-stroke
Front Brake	Disc brake
Rear Brake	Disc brake
Fuel System	Keihin PWK 38S AG
Ignition	Kokusan digital CDI
Rear Suspension	WP monoshock