Question about 2008 Tank Sports Urban 50

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Why won't my scooter start/

Just replaced carburetor & fuel line, but still giving me problems. When it does start it idles OK at first, but then revs up and shuts off all by itself. Then it won't start - engine turns over but won't start.

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You have a fuel blockage problem. The fuel gets into the carby slowly and allows you to start but the rev increase is an indication that the air/ fuel ration is going lean and then the motor stops. The same as if you turn off the tap and let the engine run until it stops. It won't start again until there is sufficient fuel in the carby bowl to get to the main jet.

Posted on Jul 27, 2013

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Posted on Jan 02, 2017

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1. Severely discharged or a damaged battery, 9 volts or lower.

2. Failed alternator/generator and or voltage regulator.

3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.

4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.

5. Failed system and or ignition relay, check for continuity.

6. Failed ignition coil, ignition/electronic module.

7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.

8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.

9. Air/fuel mixture screw improperly adjusted.

10. Water or dirt in the fuel system, carburetor or filter.

11. Restricted, blocked or kinked fuel line.

12. Fuel tank empty.

13. Gas cap is not venting properly or fuel tank venting system blocked.

14. A failed fuel pump, pressure regulator and or fuel injectors.

15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.

16. Needle and seat stuck closed in the float bowl.

For more information about your issue and valuable "FREE" downloads that you need please visit the websites below. Good luck and have a nice day.

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