Hi, I have a fuel issue. My bike starts fine, but 5 minutes down the road it stops, as if starved of fuel. If I take the tank lid off (no obvious sense of vacuum) and try to start it, it fires after a couple of presses. Then it runs fine (although it's just started to need a second stop 5minutes later). It's a 30,000 mile RD07. I'm sure the words fuel and pump will feature somewhere in the answer, but thanks in advance for any advice.