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andrea91Nov 15, 2025
How to fix a KTM 85 SX Motorcycle engine that fails to start?
- KKurt ManningNov 15, 2025
If your KTM Motorcycle engine won't start, it could be due to several reasons. Old fuel may be in the float chamber, or the fuel supply might be interrupted. The electrode distance could be too great, the plug fouled, or the ignition wire damaged. A faulty kill button, loose ignition cable connectors, a weak spark, or water in the carburetor could also be to blame. To resolve this, open the fuel tap and replenish the fuel, avoiding the choke. If the motorcycle hasn't been used for over a week, drain the fuel from the float chamber and fill it with fresh fuel. If there is an interruption in the fuel supply, close the fuel tap, loosen the fuel hose at the carburetor, and check for fuel flow. Clean the carburetor if necessary, or check the tank ventilation. You may also need to reduce the ele...
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