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Dyna with a little engine stutter

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Old Aug 7, 2022 | 03:15 PM
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Default Dyna with a little engine stutter

I bought a 2017 dyna lowrider with 6500 miles on it. The bike has a high flow kn air filter (now new) and Vance and Hines big shots (new as well). Also running Vance and Hines tuner (again brand new and new tune installed) After I bought bike I discovered no baffle in rear cylinder ground pounder pipe and the tuner the bike had was not assigned to the bike so could not download a map. So I don’t know if the bike was ever tuned.

anyways the bike pulls really strong during acceleration and runs perfectly down the interstate at most rpm. However, when I run around town at 2200 to 2500 rpm or so at like 45 mph or below the bike has a minor stutter or miss. Just enough to be annoying.

wondering if this is a normal characteristic or a concern. Hope someone can answer.



 
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Old Aug 7, 2022 | 03:21 PM
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Sounds like you are lugging it, drop a gear, maybe you should be in second, not third gear,
 
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Old Aug 7, 2022 | 03:34 PM
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Buster. You think I should keep maybe stay above 2500 all the time? I’m used to a 114 Milwaukee 8 on a Road Glide. That engine was good in the lower 2000 range. I’m just worried I have a bad exhaust valve or something from the straight pipe and maybe no tune.
 
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Old Aug 7, 2022 | 08:41 PM
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I would replace the baffle and see your mechanic or shop sooner rather than later.
Don't over think it through,

I'm sure someone with more experience will chime in soon
 
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Old Aug 7, 2022 | 09:21 PM
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Replaced the pipes with new Vance Hines big shots and quiet baffles. Next step is run auto tune with my new FP3 and do compression check. I just have to figure out how to unplug auto compression release so I can get a good reading.
 
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Old Aug 8, 2022 | 11:42 AM
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You should be able to defeat the ACR with your tuner
 
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Old Aug 8, 2022 | 02:40 PM
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Thanks, I figured that out this morning. My FP3 has quite a few controls I knew nothing about. So cool, turned of ACR re flashed and I could tell bike was considerable harder to turn over. Doing compression test next.
 
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