KTM 50 SX 2015 - User Manual

Questions and Answers

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Linda ScottJul 26, 2025
Why KTM 50 SX 2015 Motorcycle engine turns but won't start?
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  Mark MaldonadoJul 26, 2025
  If your KTM Motorcycle engine turns but won't start, there might be several reasons. It could be due to an operating error, old fuel in the float chamber (if the motorcycle was out of use for a long time), or an interrupted fuel feed. The spark plug might be oily or wet, or the electrode distance (plug gap) of the spark plug could be too wide. Another potential cause is a loose or oxidized connector or ignition coil.
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courtneygutierrezAug 4, 2025
What to do if my KTM 50 SX 2015 Motorcycle engine turns but does not start?
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  Autumn MckayAug 4, 2025
  If your KTM Motorcycle engine turns over but doesn't start, several factors could be at play. It could be due to an operating error during the starting procedure. Old fuel in the float chamber can also be a culprit if the motorcycle has been sitting unused for a while. Check if the fuel feed is interrupted, or if the spark plug is oily or wet. Also, the electrode distance of the spark plug may be too wide, or the connector/ignition coil might be loose or oxidized. Clean and dry the spark plug, and adjust the plug gap to 0.60 mm (0.0236 in). Clean the plug-in connection and treat it with contact spray.
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Shawn WatkinsAug 15, 2025
How to troubleshoot a KTM 50 SX 2015 Motorcycle when the engine turns but does not start?
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  Carolyn PowersAug 15, 2025
  To troubleshoot a KTM Motorcycle engine that turns but doesn't start, consider these steps: Check for any operating errors during start-up. If the motorcycle has been out of use, the fuel in the float chamber might be old. Inspect the fuel feed for any interruptions. Examine the spark plug to see if it's oily or wet. Ensure the spark plug electrode gap is correctly adjusted to 0.60 mm (0.0236 in). Also, verify that the connector and ignition coil are clean and properly connected; use contact spray if necessary.

KTM 50 SX 2015 Specifications

General

Engine Type	Single-cylinder, 2-stroke
Displacement	49 cc
Cooling System	Liquid cooled
Transmission	Automatic
Rear Suspension	WP monoshock
Front Brake	Disc brake
Rear Brake	Disc brake
Seat Height	684 mm
Starter	Kickstarter
Front Suspension	WP upside-down Ø 35 mm
Weight	40 kg
Bore x Stroke	39.5 mm x 40 mm
Front Tire	2.50-12
Rear Tire	2.75-10