1993 fatboy bogging out
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3rd Gear
Joined: Mar 2026
Posts: 7
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1993 fatboy bogging out
Everything was fine. I drove to go to dinner and on my way home. I left the light and when I go into first gear right when Im about to switch over the second gear, the bike starts bogging out so I have to let go of the throttle and give it more gas to stay on, but I have to keep letting go and giving a gas in order for it to not turn off and I cant get into the next gear because itll die before I even get there. Does anyone have any idea what it might be?
I can post a video if it would help
I can post a video if it would help
Last edited by DREDAY7880; May 13, 2026 at 11:34 AM.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,528
Likes: 6,407
From: Honah Lee
Start simple and most obvious. Bad tank of gas.
Had our 2004 FI for 22 years. Only running issue it ever had. Filled up on the way to work. On the way home, it would not idle with out throttle.
Now it did run OK with enough throttle.
When I read your post, it appears to be getting too much fuel?
When was the last maintenance done?
PS.. Welcome to the HDFORUM.
Had our 2004 FI for 22 years. Only running issue it ever had. Filled up on the way to work. On the way home, it would not idle with out throttle.
Now it did run OK with enough throttle.
When I read your post, it appears to be getting too much fuel?
When was the last maintenance done?
PS.. Welcome to the HDFORUM.
Last edited by Jackie Paper; May 13, 2026 at 11:48 AM.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,528
Likes: 6,407
From: Honah Lee
Not sure 100 % what you are saying but it's not going to act up as soon as you start it on bad fuel at the station.
New fuel doesn't mean anything if it had water in it from there tank. In my case, it was pure ethanol.
The service station had to remove his two tanks. I was still messing with it for over a week when I noticed station was red and yellow taped. It made the papers.
There were hundreds of cars got it.
Now like I said, simple. If you know fuel is OK, start your next best guess.
If not fuel, maintenance or carburetor.. Maybe trash under needle, seat, or float if your lucky
New fuel doesn't mean anything if it had water in it from there tank. In my case, it was pure ethanol.
The service station had to remove his two tanks. I was still messing with it for over a week when I noticed station was red and yellow taped. It made the papers.
There were hundreds of cars got it.
Now like I said, simple. If you know fuel is OK, start your next best guess.
If not fuel, maintenance or carburetor.. Maybe trash under needle, seat, or float if your lucky
Last edited by Jackie Paper; May 13, 2026 at 12:20 PM.
Stellar HDF Member
Joined: Sep 2021
Posts: 2,014
Likes: 1,467
From: Black Hills of SD
Does it feel like it is fuel starved or flooding [ smell strong of gas ] ? Carb will need to some love or the fuel screen in tank. Could even be the vacuum for the petcock valve leaking and not allowing sufficient fuel flow. I do not know if the 1993 has a vacuum activated petcock - so that was assumption on my part that it probably does.
Thread Starter
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3rd Gear
Joined: Mar 2026
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[QUOTE=MarlinSpike;22277698]Does it feel like it is fuel starved or flooding [ smell strong of gas ] ? Carb will need to some love or the fuel screen in tank. Could even be the vacuum for the petcock valve leaking and not allowing sufficient fuel flow. I do not know if the 1993 has a vacuum activated petcock - so that was assumption on my part that it probably
is it possible that it only happens once bike is hot ? Because the night before it didnt do it at all, but I didnt go That far but yesterday I stopped at a lot of lights on the way home so I think it got warmed up and then when I was close to my house about a block away and when it started doing it, but I just went out there now to try to diagnose it a little bit and wrote it around the block and it didnt do it at all. Hopefully that helps with being able to diagnose it. *Rode
is it possible that it only happens once bike is hot ? Because the night before it didnt do it at all, but I didnt go That far but yesterday I stopped at a lot of lights on the way home so I think it got warmed up and then when I was close to my house about a block away and when it started doing it, but I just went out there now to try to diagnose it a little bit and wrote it around the block and it didnt do it at all. Hopefully that helps with being able to diagnose it. *Rode
Last edited by DREDAY7880; May 13, 2026 at 07:09 PM.
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From: Utopia
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Stellar HDF Member
Joined: Sep 2021
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Likes: 1,467
From: Black Hills of SD
You have a tough one to diagnose, especially for us that can only use what you describe to try and take a shot at helping.
You need to try and determine - Fuel or electrical, as that area to try to trouble shoot. Things to check if you believe it is fuel related.
Fuel flow to carb
Petcock valve function
Fuel starvation or fuel flooding?
More info would help.
Any back firing, popping. Surging when it does come back from the bog. Smell of fuel. Fuel out of the vent tubes on the ground. Same condition if petcock in reserve position. All the vacuum tubes soft and still connected to the petcock. Is there a inline fuel filter? Those kinds of things, to try and get a direction to pursue.
You need to try and determine - Fuel or electrical, as that area to try to trouble shoot. Things to check if you believe it is fuel related.
Fuel flow to carb
Petcock valve function
Fuel starvation or fuel flooding?
More info would help.
Any back firing, popping. Surging when it does come back from the bog. Smell of fuel. Fuel out of the vent tubes on the ground. Same condition if petcock in reserve position. All the vacuum tubes soft and still connected to the petcock. Is there a inline fuel filter? Those kinds of things, to try and get a direction to pursue.
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Thread Starter
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3rd Gear
Joined: Mar 2026
Posts: 7
Likes: 1
You have a tough one to diagnose, especially for us that can only use what you describe to try and take a shot at helping.
You need to try and determine - Fuel or electrical, as that area to try to trouble shoot. Things to check if you believe it is fuel related.
Fuel flow to carb
Petcock valve function
Fuel starvation or fuel flooding?
More info would help.
Any back firing, popping. Surging when it does come back from the bog. Smell of fuel. Fuel out of the vent tubes on the ground. Same condition if petcock in reserve position. All the vacuum tubes soft and still connected to the petcock. Is there a inline fuel filter? Those kinds of things, to try and get a direction to pursue.
You need to try and determine - Fuel or electrical, as that area to try to trouble shoot. Things to check if you believe it is fuel related.
Fuel flow to carb
Petcock valve function
Fuel starvation or fuel flooding?
More info would help.
Any back firing, popping. Surging when it does come back from the bog. Smell of fuel. Fuel out of the vent tubes on the ground. Same condition if petcock in reserve position. All the vacuum tubes soft and still connected to the petcock. Is there a inline fuel filter? Those kinds of things, to try and get a direction to pursue.
I will check all that and report back. Thanks for trying to help.
Thread Starter
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3rd Gear
Joined: Mar 2026
Posts: 7
Likes: 1
You could also try the Evo forum, for Softails 1984-1999: EVO - Harley Davidson Forums
yeah I could try that maybe I will if I cant figure it out while posting in this forum.