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I recently tore down my bike to the frame to paint it to it to cover some scratches that had rusted over and I got everything put together and went to start it fuel pump kicks on every time I turn the key on and will run for about 2 seconds and die I’ve checked all the connections to make sure they were plugged in. Any ideas on if it’s fuel related or electrical? I changed the spark plugs while the engine was out too and gapped them accordingly
 

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Never had it happen to me, but I've heard of issues with fuel tank venting, leading to a build up of vacuum in the tank. Eventually the negative pressure overcomes the pump's ability to deliver fuel. I'd try starting it up, then as soon as it dies opening the fuel tank and see if air rushes in.
 

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I think I've heard about similar issues that were caused by the ignition. Proper voltage wasn't getting to the coils after start-up - or something. Broken or disconnected wire possibly. Something about the inline resistor maybe.

You may be able to search and find the thread I'm thinking of.
 
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