05-05-14, 09:08 AM
Has your tank been lifted lately, I have seen written somewhere the breather pipe under it can get kinked and do the same sort of thing, try a run out until it stops open the filler cap and see if it starts straight away, I had this on the CB500 I did my DAS on, I ended up opening the tank every time we stopped for a chat, got me back to the instructors base. HTH.
If you worried about falling off your bike, you'd never get on.