2015 HARLEY-DAVIDSON XG750

WHEN FUEL IS LOW (USUALLY BELOW 1 GALLON), THE MOTORCYCLE BEHAVES DANGEROUSLY WHEN ACCELERATING FROM A STOP. VEHICLE WILL BEGIN TO MOVE FORWARD, SUDDENLY LOSE POWER CAUSING IT TO SLOW DOWN, AND SUDDENLY REGAIN POWER CAUSING IT TO ACCELERATE UNEXPECTEDLY. MOST LIKELY CAUSE IS FUEL PUMP STARVATION. FUEL PUMP IS LOCATED AT FRONT OF THE TANK, AS VEHICLE MOVES FORWARD THE REMAINING GAS IS PUSHED TO THE REAR OF THE TANK, PUMP CAN'T MAINTAIN FUELING TO FUEL INJECTORS, CAUSING THE BIKE TO LOSE POWER AND SLOW. THE GAS THEN MOVES FORWARD, PUMP ACCESSES THE FUEL AND FEEDS THE SYSTEM CAUSING A SUDDEN AND UNEXPECTED RETURN OF POWER AND ACCELERATION. AT STOPLIGHTS AND STOP SIGNS THIS COULD EASILY RESULT IN THE MOTORCYCLE BEING REAR-ENDED, AND IN CORNERS COULD EASILY CAUSE THE REAR WHEEL TO LOSE TRACTION RESULTING IN AN ACCIDENT. *TR

AT LOW FUEL (APPROX .9 GALLONS LEFT IN TANK), WHILE ACCELERATING FROM A STOP, MOTORCYCLE WILL LOSE FUEL PRESSURE, UNEXPECTEDLY THROWING THE RIDER FORWARD. A SECOND LATER, THE FUEL DELIVERY RESUMES, THROWING THE RIDER BACKWARDS. FILLING THE TANK WITH FUEL FIXES THE PROBLEM UNTIL A LOW FUEL CONDITION IS ONCE AGAIN REACHED. THIS HAPPENED TO ME SEVERAL TIMES. MOST RECENTLY WHEN THIS OCCURRED, I STOPPED TO FILL THE TANK. I PUT 2.6 GALLONS OF GAS IN THE 3.5 GALLON CAPACITY TANK, AND THIS SOLVED THE "LAG AND LEAP" PROBLEM. I HAVE CALLED H-D FACTORY 3 TIMES REGARDING THIS ISSUE, THEY ALWAYS REFER ME TO MY DEALER, WHERE THE BIKE HAS ALREADY BEEN IN FOR THIS ISSUE 3 TIMES. I BELIEVE AT LOW FUEL CONDITION, THE REMAINING FUEL IN THE TANK IS BEING FORCED AWAY FROM THE PICKUP DURING ACCELERATION, AND RETURNING SHORTLY THEREAFTER, CAUSING THIS VERY UNSAFE CONDITION. *TR

FUEL TANK CAPACITY IS 3.5 GALLONS. AT APPROXIMATELY .9 GALLONS LEFT IN THE TANK, THE FUEL WILL CUT OUT WHEN ACCELERATING FROM A STOP, THROWING THE RIDER FORWARD. AFTER APPROXIMATELY 2 SECONDS, THE FUEL SYSTEM RECOVERS, THROWING THE RIDER BACKWARDS. THE FUEL IN THE TANK IS BEING FORCED TO THE REAR OF THE TANK WHEN ACCELERATING FROM A STOP, CAUSING THE STALL CONDITION. *TR

STARTING WITH A FULL TANK OF GAS I DROVE FOR APPROXIMATELY 100 MILES AND THE BIKE BEGAN TO SURGE AND BUCK. PROBLEM GETTING WORSE THE MORE I DROVE. AFTER 20 MILES THE LOW FUEL LIGHT CAME ON . I FILLED TANK WITH FUEL AND THE PROBLEM WENT AWAY UNTIL I AGAIN DROVE APPROXIMATELY 100 MILES. BUCKING SURGING BEGAN AGAIN AND GOT CONTINUALLY WORSE UNTIL THE LOW FUEL LIGHT CAME ON 20 MILES LATER. FILLED WITH GAS AND PROBLEM CLEARED UP. DEALER HAS HAD BIKE THREE TIMES TO REPAIR. THIS LAST TIME I TOLD THEM THE FUEL PUMP IS LOSING SUCTION POSSIBLY BECAUSE OF PROBLEM WITH FUEL PICKUP TUBE. I WILL PICKUP AT DEALER AGAIN. DEALER RECOMMENDED I NOT LET FUEL LEVEL GET LOW. HOPEFULLY IT IS FIXED BUT NOT LETTING THE FUEL LEVEL GET TOO LOW IS AN UNACCEPTABLE FIX. *TR

WITH ROUGHLY .9 GALLONS OF FUEL IN TANK, WHEN LEAVING A FULL STOP, VEHICLE PAUSES HARD ON ACCELERATION. PROBABLE CAUSE IS FUEL STARVATION CAUSED BY FUEL FLOWING BACK IN THE TANK, AWAY FROM THE FRONT-LOCATED FUEL PUMP, STARVING EFI SYSTEM OF GASOLINE. AS FUEL MOVES FORWARD AFTER A BRIEF PAUSE IN FORWARD MOMENTUM, THE PUMP HAS ACCESS TO THE FUEL AND THE BIKE SUDDENLY LURCHES FORWARD. THIS HAPPENS MULTIPLE TIMES AS THE FUEL IN TANK TRAVELS FORWARD AND AFT. EXTREMELY UNSAFE CONDITION AT LOW SPEEDS, ESPECIALLY AT INTERSECTIONS WHEN THIS IS MOST LIKELY TO OCCUR. *TR

WHEN LAUNCHING FROM A COMPLETE STOP THE BIKE FAILED TO ACCELERATE.THIS HAPPENED ON MORE THEN ONE OCCASION THAT DAY AND THEN THE LOW FUEL LIGHT WENT ON. I THOUGHT OKAY I AM OUT OF GAS AND THAT'S WHAT CAUSED THE MOTORCYCLE TO LURCH AND THEN LAUNCH THIS IS A VERY UNSAFE PRACTICE WHEN I TOOK IT TO THE GAS STATION TO FILL UP WHAT I THOUGHT WAS AN EMPTY TANK I NOTICED THE TANK WAS HALF FILLED WITH GAS. I FILLED IT ANYWAY AND THE PROBLEM WENT AWAY, I BELIEVE THE TANK IS EITHER NOT PRESSURIZED CORRECTLY OR THE FUEL VALVE IS LOCATED AT THE WRONG PART OF THE TANK. I HAVE OWNED MANY OF MOTORCYCLES AND HAVE NEVER HAD THIS ISSUE. I WOULD LIKE TO SEE AN INVESTIGATION AS TO WHAT THE PROBLEM IS I KNOW I AM NOT THE ONLY ONE WITH THIS ISSUE BASED ON THE FORUMS THAT I HAVE READ. *TR

WITH ROUGHLY .9 GALLONS OF FUEL IN TANK, WHEN LEAVING A FULL STOP, VEHICLE PAUSES HARD ON ACCELERATION. PROBABLE CAUSE IS FUEL STARVATION CAUSED BY FUEL FLOWING BACK IN THE TANK, AWAY FROM THE FRONT-LOCATED FUEL PUMP, STARVING EFI SYSTEM OF GASOLINE. AS FUEL MOVES FORWARD AFTER A BRIEF PAUSE IN FORWARD MOMENTUM, THE PUMP HAS ACCESS TO THE FUEL AND THE BIKE SUDDENLY LURCHES FORWARD. THIS HAPPENS MULTIPLE TIMES AS THE FUEL IN TANK TRAVELS FORWARD AND AFT. EXTREMELY UNSAFE CONDITION AT LOW SPEEDS, ESPECIALLY AT INTERSECTIONS WHEN THIS IS MOST LIKELY TO OCCUR." ALSO CAUSES THE BIKE TO NOT START UP RIGHT. MANY TIMES IT TAKE 3 OR 4 TIMES TO GET THE BIKE STARTED WHEN ITS UNDER HALF A TANK OF GAS. *TR

WITH ROUGHLY .9 GALLONS OF FUEL IN TANK, WHEN LEAVING A FULL STOP, VEHICLE PAUSES HARD ON ACCELERATION. PROBABLE CAUSE IS FUEL STARVATION CAUSED BY FUEL FLOWING BACK IN THE TANK, AWAY FROM THE FRONT-LOCATED FUEL PUMP, STARVING EFI SYSTEM OF GASOLINE. AS FUEL MOVES FORWARD AFTER A BRIEF PAUSE IN FORWARD MOMENTUM, THE PUMP HAS ACCESS TO THE FUEL AND THE BIKE SUDDENLY LURCHES FORWARD. THIS HAPPENS MULTIPLE TIMES AS THE FUEL IN TANK TRAVELS FORWARD AND AFT. EXTREMELY UNSAFE CONDITION AT LOW SPEEDS, ESPECIALLY AT INTERSECTIONS WHEN THIS IS MOST LIKELY TO OCCUR. *TR

ALMOST AT EXACTLY 90 MILES, WHEN THERE IS STILL 1.5 GAL OF GAS IN THE CYCLE IT WILL STALL OUT LIKE SOMEONE HIT THE KILL SWITCH SO IT THROWS YOU FORWARD ON THE BIKE. THEN IT COMES BACK ON AND PRACTICALLY THROWS YOU OFF BACKWARDS. IT GETS WORSE AT THE 100 MILE MARK AS THE "STALL" WILL HAPPEN EVEN IN HIGHER GEARS AND AT HIGHER SPEEDS. WHEN I THEN PUT GAS IN IT, THE PROBLEM GOES AWAY FOR THE NEXT 90 MILES. NOT SAFE AND INEXPERIENCED RIDERS COULD BE THROWN OFF THE BIKE. *TR