Trike is a 2007 ZZ4 with throttle body/ fuel injection. Acting starved for fuel, won't accelerate hard, stumbles every once in a while. Fuel filter from gas tank is clear. Fuel pump squeals like a pig when key turned on. Bad sign or normal? See picture; is the black can next to the distributor a pressure regulator? It leads to the throttle body and is not clogged but is hard to blow through. On the other picture showing a corner of the battery, is that another pressure regulator on the lower left? The fuel pump on far right of the picture, correct? I've heard talk of a "red pump" replacement. Details on the red pump, NAPA number? Any advice appreciated! Sooner or later this nasty weather has to break and riding season will be here!