Check out this Quality V-Twin Fuel Tank Transfer Sharing System. This attaches to the stock check valve and allows fuel transfer from one bike to another or to use for draining the fuel tank for seasonal storage. Transfer of fuel is at roughly one quart every 20 seconds. Will not stall the engine while in use.
Comes in its own small and compact storage pouch to be stored anywhere. Does not work with V-Rod model. All models with EFI 2001 and up.