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Discussion Starter #1
Later it turned out the old pump was good...I did not test it before installing the new one because it is not rare when the pump goes wrong in these bikes.

Now there is a new pump + new filter and after 5 minutes of idling the engine died.

My only tip is vacuum builds up in the fuel system.

Did anybody experienced such a symptome before? What was the solution?
 

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On the 900 Supersport people need to be very careful when lowering the tank.
It is easy to kink the pipes underneath resulting in the vacuum.
I have read that in serious cases the tank can implode.
 

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Hey I posted this 5 days ago.
According to stats you were online a day ago.
Any feedback?
See my signature.
 

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Discussion Starter #4
Hi Richard,

I wrote back to you but finally missed to hit the enter button, so the message stayed unsent. So in my case this is not the problme, I wish it was, but I always check fuel lines first. More over I opened the tank up and tried this way as well and no difference. The pump does not work. Simple stopped working. The new pump. New filter. AND the old pump is working too as later turned out when I tested it. Since then I did not have the time to check. I will check the pressure regulating valve I cant think of anything else.

Best regards

Gergő
 

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No worries Gergő
What Blitzen suggests is a good way to eliminate or find one thing.
 

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If the tank is sucking air when you open it, the vent isn’t working. Check the vent line and that the little can in the line is clear.
 
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