2015 Harley-Davidson XG750: sudden loss of power

Filed Mar 15, 2019 · Brakes, Fuel system · 124 miles · PA · crash · 1 injury

I complained about the performance of the bike and the dealer told me that I had to just break it in. I had other persons ride it and told me that perhaps it was the throttle and or fuel injector. I called and complained again and they said that I needed to just ride it more and get use to it. I said it was losing power and maybe the injector was clogged. I took it to a local mechanic who then said that because it's under a warranty and the fuel injector is computerized that the bike should be looked at by the dealer. I called the dealer again and explained to the tech what I was told. He said we will make some adjustments and see what happens. He said I can have a trailer pick it up at my cost of $50 or so each way. Unfortunately, work got in the way and could not take it. The next season in 2017 I had the same issue expect this time it caused my accident. This propelling of fuel all at once to my bike almost killed me and injured me severely. The fuel gauge went on as I was rolling to a stop and continued through in first or second gear and then suddenly the bike bogged down and accelerated almost on it's with such intensity I lost control. Hit front and back break but back failed to engage enough to keep me straight ended up lifting back tire and flying over handle bars.

Filed Jul 11, 2015 · Fuel system · 155 miles · NY

While driving at a steady 35 MPH or so, the bike suddenly lost engine power (as if I closed the throttle) then without warning it opened right back up and lunged me forward as if I suddenly twisted the throttle open again. This has happened both times I got low on gas but before the gas light came on! There was still quite a bit of gas in the tank. And when I fill up, the problem disappears until I drive another 75 miles or so.

Filed Jul 6, 2015 · Fuel system · 250 miles · PA

The low fuel warning light illuminated few minutes before the incident. The incident happened at a red light on a 55 MPH road. I was first in line in my lane. I attempted to proceed through the intersection when the light turned green. I rolled maybe a few inches and the bike lost all power, followed by an immediate surge of power. This happened 3 times while trying to cross the intersection. My passenger and I were almost thrown from the bike. It felt as if every time the fuel sloshed back and forth the surge and stall would happen.

Filed Jun 16, 2015 · Fuel system · 292 miles · WV

I was riding my bike home from work on 6/1/2015 and have continued to notice rough throttle response which is something ive experienced since I purchased it. The issue did seem to be a little worse than usual though when leaving the parking lot at work. I think the tripmeter was at about 85 miles or so when I left. As im riding home, the low fuel light never came on and was ridding great while in 3rd gear and up. Starting from a stop light was jumpy though but again, something ive continued to experience since bringing the bike home and not sure if it was normal or not. When close to my house, which is at the top of a hill, I was riding up the hill in first gear which I always have to do since its pretty steep. About half way up the hill the bike felt like it was going to stall which made me lean forward a bit due to losing some momentum. Then the bike surged forward which almost made me do a wheelie. I really had to work the clutch to keep the bike from getting away from me. During this time though, the low fuel light came on. The bike continued to lose power and surge until I finally made it to the top of the hill where my house is. The tripmeter then read 103.6 miles with the odometer showing 292 total miles. The bike has been to the dealership for over a week and the last update I received was that the mechanic couldn't find anything wrong with it and that the factory said to fill it up with gas and if it happens again, to bring it back for repair. I said that I'm not comfortable riding the bike until it's fixed. I also said that if the bike is low on gas, it will be easy to recreate the issue. Unfortunately, I had to put gas in it to ride it to the dealership. He said he will have the mechanic take another look.

Filed May 12, 2015 · Fuel system · 46 miles · FL

Intermittent lag-and-leap/surge-and-buck issues. I felt my motorcycle quickly lose power and shortly after lunge forward quickly and unexpectedly. Each time this problem has occurred, I have had approximately 1 gallon of fuel left in my tank or slightly less.

Filed May 12, 2015 · Fuel system · 540 miles · GA

When I took off from a light in traffic, taking off in first gear, after I let the clutch out fully, it hesitated as if it were out of fuel. I was lunged forward from the sudden loss of power. After that, before I could reduce the throttle position, the bike lunged forward almost throwing me off the back. This cycle continued a few times like a bucking bronco. The people around must have thought I was an experienced rider, however this is not the case, I have ridden for many years. It was as if it was starving for fuel when I took off, then suddenly the fuel flow was returned. My low fuel light was not on, and my trip meter since my initial fill-up was at 90 miles. I immediately went to fill it up with fuel. Once it was full, the problem went away. However, the week my trip meter hit 90 miles again. The same thing happened as before. This is the second time I have been nearly thrown off of the bike. Each time a trip to the station to get about 2.6 gallons of fuel fills it up, and it is fine for another 90 miles. I'm not sure why there is a low fuel light, I could never ride it until that comes on. And, I would expect to be able to range more than 90 miles with 3.5 gallons of fuel. This seems to be a design problem that I feel is dangerous, especially for inexperienced riders.

Filed May 1, 2015 · Fuel system · 90 miles · FL

Intermittent lag-and-leap/surge-and-buck issues. While making a right turn onto a major thoroughfare, lost power to the engine, and upon giving a small amount of additional throttle, power came back full force, and front tire lost contact with the ground briefly. Having attributed the issue to being a new rider, practice was engaged the same evening. Extreme issues followed, including stalling three times while attempting to cross an intersection, and an extremely unsafe ride home followed, luckily without major incident. Motorcycle was towed into the shop the following day at 90 miles, and the fuel pump was replaced. Issues have not raised themselves again since the repair, however, as some have stated they came back, and hd otherwise has not issued a recall, I add my complaint to the list in the hopes that others will not be put into danger by this potentially very unsafe condition.

Filed Apr 30, 2015 · Fuel system · 1,300 miles · NV

My husband and I were riding together, sitting still at a light, first to take off at green light with cars behind us. We took off, & my bike took off, sloshing fuel to back of tank, & I lost all power for a moment in the middle of a city interception. As the fuel sloshed back forward & backwards, it gave me some intermittent acceleration power to limp through the intersection. I immediately pulled into the middle turn lane section of the road so vehicles could pass me, I am lucky I was not hit. My low fuel light was not on yet, & my mileage on this tank was about 119. Since I am familiar with this issue from reading feedback, I simply took off extra slow from every stop until we reached our destination, and then it happened again before we reached a gas station. We put in 2.7 gals, meaning I had .9 gal left, & my low fuel indicator had only began to fade on & off while riding. My dealership said the factory had no experience with this & the factory had no solutions & this wasn't a common problem. I rode the motorcycle to laughlin river run, keeping it fueled up before I hit 100 miles per tank, nervous because of the hills involved. Fed up with thr downplay of a life threatening issue, I called customer service line from a gethuman site & the next day my dealership calls me saying they have the fuel assembly replacement which will be installed after my dyno tune is finished. I paid for custom paint, a seat, a luggage rack, a bag, vance & hines slip on muffler, a buckshot heat shield, a screaming eagle intake, and a dyno tune. Plus I bought & had a windshield installed. I hate my bike being on the shop & don't like having issues downplayed after spending that kind of $ on a street 750! How about some baffles in the tank or other solution? A new rider like me is lucky that I read about this before I rode, most will not & could be killed or thrown from bike.

Filed Apr 27, 2015 · Fuel system · 182 miles · WI

While driving my 2015 harley-davidson street 750 yesterday, and a couple times in the past, upon accelerating I felt my motorcycle quickly lose power and shortly after lunge forward quickly and unexpectedly. Each time this problem has occurred, I have had approximately 1 gallon of fuel left in my tank or slightly less. The first time this happened, I was nearly thrown backwards off my bike because of the rapid forward acceleration, to the point where my hands actually came off the grips for a split second. I shrugged it off and chalked it up to being a new rider but then when happening again I was concerned. I experienced the same problem again yesterday multiple times, and each time upon refueling, the problem was fixed.

Filed Apr 20, 2015 · Acceleration, Fuel system · 171 miles · MI

From 0mph, under moderate acceleration bike lost all power for a moment then quickly accelerated, happened over the course of about a second. Very dangerous, less experienced riders could become injured or could cause an accident on public roads with moderate traffic.

Filed Dec 16, 2014 · Engine, Fuel system · 70 miles · NY

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.