FE 390 runs great but won't Idle

there are fuel injector cleaning additives you can add to your fuel. give that a try?

and next time don't lay up your bike so long without turning it over ya hear!!!!


Taffy

Riding a 2010 390, 296 hrs with a new piston at 285 hrs.
I'm having exactly the same problems with stalling. It is now so bad that when riding trails, if going down a hill and I pull the clutch in to coast, it will stall after about 30 seconds. Sometimes it will stall if I give it a bit of gas coming up off idle with the clutch in, even on a downhill with the known clutch dragging issue which should help to keep the engine moving on a down hill.
I've replaced the fuel pump, and fuel filter, which was quite black and starting to implode from the pressure off the pump. Seems my old pump was just fine.
I do have a concern about the fuel lines inside the tank. The hose between the filter and the quick-disconnect is kinked at either end. This is downstream from the pump, so it may straighten out when under operating pressure, but it seems like it would restrict fuel flow if it doesn't. I can't find a source for those fuel lines anywhere. Any leads would be appreciated.
I'm about to go into the injector and clean that too. A mechanic friend of mine also tells me that tight intake valves could cause stalling. So the top end needs to come of and valves gaped and re-shimmed if necessary.
Please post your solution if you find one. I'll do the same if I fine one.