2015 HARLEY-DAVIDSON XG500 Engine Problems

JULY 3, 2015 - IT STALLED TWICE WHILE SITTING COMPLETELY STOPPED AT STOP SIGNS WITH THE CLUTCH FULLY PULLED IN. IT IDLED LOW AND THEN COMPLETELY DIED. RESTARTING THE BIKE, I WAS ABLE TO GET IT MOVING WITH QUITE A BIT OF LEAPING AND LAGGING AND THE ENGINE SPUTTERING. ONCE UP AND THROUGH 1ST AND 2ND GEAR (SPUTTERING LIKE IF WAS MISSING FUEL) IT SEEMED TO SUDDENLY ENGAGE AND WAS OK. I COMPENSATED FOR THE LAGGING, BUT IT KEPT JUMPING AS IF SUDDENLY CATCHING WITHOUT PRESSURE ON THE THROTTLE INCREASING. IT DID THIS MOSTLY AT LOWER SPEEDS AT FIRST, BUT ALSO LEAPS WHEN AT HIGHER SPEEDS (45-55MPH) ON RURAL ROADS - AGAIN, JUMPING INTO THE HIGHER SPEED SUDDENLY AND WITHOUT AN INCREASE ON THE THROTTLE. ON JULY 18, 2015, THE BIKE JUMPED WHILE TAKING A TURN FROM ONE STREET ONTO ANOTHER, STARTLING ME AND CAUSING ME TO VEER FROM MY...