KTM 125 EXC EU User Manual (English)

Questions and Answers:

J
Jessica BakerSep 8, 2025
Why does my KTM 125 EXC EU Motorcycle engine have too little power?
- H
  Harold WardSep 8, 2025
  If your KTM Motorcycle engine has too little power, several factors could be responsible. A potential cause is an interrupted fuel feed, so check the fuel tank breather and clean the fuel tap, and check/set the carburetor components. A very dirty air filter can also restrict performance. Also, check the exhaust system for leaks or deformation, and replace the glass fiber yarn filling of the main silencer if needed. Lastly, inspect the diaphragm and reed valve housing for damage.
M
Melissa MccormickSep 10, 2025
What causes a KTM Motorcycle engine not to speed up?
- C
  Christopher CarrollSep 10, 2025
  If your KTM Motorcycle engine does not speed up, a dirty or worn float needle causing the carburetor to run over could be the problem, so check/set the carburetor components. Loose carburetor jets can also prevent the engine from speeding up, so check/set the carburetor components. A fault in the ignition system may also be the cause.
D
Daniel FletcherSep 12, 2025
What to do if my KTM 125 EXC EU engine cannot be cranked?
- W
  William SmithSep 12, 2025
  If your KTM Motorcycle engine won't crank, it could be due to several reasons. You might not be following the correct start procedure. The battery could be discharged, requiring a recharge, voltage check, closed current check, and alternator inspection. The main fuse might be blown, so remove and reinstall it. Alternatively, the starter relay or motor could be faulty, requiring a check.
J
Jeffrey SandersSep 13, 2025
What to do if my KTM Motorcycle engine cannot be cranked with the electric starter?
- J
  Jon HayesSep 13, 2025
  If your KTM Motorcycle engine won't crank with the electric starter, several factors could be at play. It might be due to an operating error during the start procedure. Another cause could be a discharged battery, so you should recharge it and check the charging voltage, closed current, and alternator. Also, inspect the main fuse and replace it if it's blown. The starter relay or the starter motor itself could be faulty, requiring a check.