Lurching at Steady Speed - Harley Davidson Street Forum - Street 500 and 750
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post #1 of 57 Old 02-21-2017, 08:52 PM Thread Starter
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Lurching at Steady Speed

Hey everyone, purchased a 2017 750 last Saturday. My first Harley Davidson and first bike after about 30 years.

When I got it home, I has some issues starting it. Pressing the start button would do nothing. I'd play with it for a bit, in and out of neutral, kickstand up/down, clutch in/out, then it would start. That issue seemed to have went away because it's ok now.

My main issues is it's jerking/bucking while I'm holding the throttle steady doing about 25 MPH or under. I've only been riding in the neighborhood until I get used to the bike so I don't know how it does at higher speeds.

Is this normal during a break in? I tried up and down shifting to different gears but it doesn't help. It just jerks and bucks down the road, unless I'm accelerating, then it's fine.

Any insight is appreciated.
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post #2 of 57 Old 02-21-2017, 09:16 PM
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This is exactly what has been happening with my bike for months. I can't figure out why mine does it. I just cope with it now because I really don't want to take it to my HD dealer and get screwed with their high prices. My model wasn't a model that had the pump inlet recall either, but it still seems like it has something to do with the fuel system. If you find anything out on it please let me know because more than likely that's the same problem with mine.
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post #3 of 57 Old 02-21-2017, 09:31 PM
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You should take that right back to the dealer. That's definitely not normal
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post #4 of 57 Old 02-21-2017, 09:37 PM
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The only logical thing I can come up with is the lag and leap issue with the xg's... But I looked up my VIN and my 2015 model wasn't one of those that were recalled. The solution would be to replace the fuel pump, but I don't understand why it would be in that "lag and leap" category but my model wasn't one of those that were recalled. I know if I take it into the dealership they will tell me it is because of the modifications I have done to the bike, so I'm kinda at a crossroad.
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post #5 of 57 Old 02-21-2017, 09:38 PM
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And I know they 2017 models wouldn't be in the recalled category so it makes me think it may be something different... Hmm..
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post #6 of 57 Old 02-21-2017, 11:05 PM Thread Starter
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At first I thought it was maybe a fuel starvation issue, but it clears up while accelerating. So if it wasn't getting fuel, it seems like giving it throttle would make it worse.

It's only when trying to keep a steady speed. I'm having someone else take it for a ride tomorrow just to make sure it's not me. And I will call the dealer.
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post #7 of 57 Old 02-22-2017, 12:28 AM
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Same here man... Everything you are describing is happening with mine. If I want to get up and go in a hurry the bike runs perfect, but if I want to just cruise around town 25-30 mph then it sputters. Does yours do it when cornering too? Like trying to keep a steady speed in a corner and it starts sputtering? Mine does it all of the time whether my tank is full or empty. It seems to me like it runs better without as much sputtering when the weather is warming in like the 70's range, but it may not have anything to do with it... Either way, it still does it and apparently it isn't normal so if you take it to your dealership please tell me what they say is wrong with it.


Thanks!
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post #8 of 57 Old 02-22-2017, 12:29 AM
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for me I just bought the fp3 and remapped bike. It runs smoothly with no throttle now

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2016 Street 750 "Vivid Black"
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post #9 of 57 Old 02-22-2017, 01:01 AM
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I also bought an fp3 and a v&h VO2 high flow filter and remapped it with fp3 and it still sputters at low speeds.
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post #10 of 57 Old 02-22-2017, 02:55 AM
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Did you autotune it?

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