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'02 KTM 520 EXC...

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It'll only run with the choke on. Turn off the choke after tis warmed up and it sputters and backfires and dies. The local shop has gone through the carb and cleaned it. I've replaced the tank and fuel line and it still does it. A local said there might be an air leak by the magneto - no idea how to check that. Any other ideas?

 

Thanks.

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Don't go to that shop again!

 

You pilot jet or the passage above the pilot jet, is clogged partially or completley

 

Use #15 fishing line for the passage, and replace the pilot jet with a new one

 

There is no 'air leak by the mageto' problem on a four stroke.....only a two stroke, and it would not have those symptoms.

 

Your locals are knuckleheads

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