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I am back into another Heritage after a few years of model "excursions". Back full circle and feeling "home again".
I bought a 2023 114 and so happy to be back on a Heritage again. I have owned two previous Heritage, post 2018 models and never had an issue I am having with the 2023. It had just over 1800 miles on it and I bought it in February. Weather has been exceptionally lousy in KY so I have only put about 300 miles on it. I have a temp controlled shop where it is kept and after each ride, the gas fumes are strong enough to open the doors and air the shop out. No obvious fuel leaks and I have thoroughly checked.
Called my dealership today and spoke with a service rep I know and he immediately, without hesitation said this is a common issue with "SOME" Softails. I was told the venting system is probably the issue and the motor company is aware but has no idea or fix available. I am not sure I buy that. I have owned over 11 bikes in my lifetime and never had this issue.
Does anyone have any input or confirmation that this is a Softail issue with no "fix"?
Thanks for any input, advice, or just talk to me!
Stay safe.
Last edited by Rusty Bucket; Mar 6, 2026 at 07:39 PM.
I am back into another Heritage after a few years of model "excursions". Back full circle and feeling "home again".
I bought a 2023 114 and so happy to be back on a Heritage again. I have owned two previous Heritage, post 2018 models and never had an issue I am having with the 2023. It had just over 1800 miles on it and I bought it in February. Weather has been exceptionally lousy in KY so I have only put about 300 miles on it. I have a temp controlled shop where it is kept and after each ride, the gas fumes are strong enough to open the doors and air the shop out. No obvious fuel leaks and I have thoroughly checked.
Called my dealership today and spoke with a service rep I know and he immediately, without hesitation said this is a common issue with "SOME" Softails. I was told the venting system is probably the issue and the motor company is aware but has no idea or fix available. I am not sure I buy that. I have owned over 11 bikes in my lifetime and never had this issue.
Does anyone have any input or confirmation that this is a Softail issue with no "fix"?
1. Make sure the gas tank is filled with fuel as the hot engine under the tank will vaporize the gas if the fuel is below 1/2 full. A full tank will prevent vaporization.
2. Shut it off and allow it to cool down outside for 30 minutes before putting it into the garage or shop.
3. May also want to check for a leaky injector that does not close off all the way when the engine shuts down and the fuel system is still pressurized. Pull the air filter off and see if you can smell or see any fuel in the throttle body.
4. Check your vent hose, vent valves, and and evap system are properly hooked up and not disconnected somehow.
CoolBreeze3646 showed you the two fuel tank vent systems available on 2023 Softails.
The first pic that just shows #7, the #62150-85 fuel vapor valve, is the 49 state version. It only has that old tech valve in the fuel tank vent line. The same vent valve has been used since 1985. The old style fuel vapor valve is supposed to limit any actual fuel from leaking out the tank, but does nothing to stop the fumes... That is, after all, the fuel tank vent line. It needs to vent.....
The second pic with the charcoal canister, is the CARB approved vent system that is only on CA models. It has a purge valve solenoid as well as the old tech #62150-85 Fuel Vapor Valve.
There is a third version that is used on many, if not all, touring bikes for many years. Their vapor valve is part of the fuel tank top plate. It seems to work much better at controlling both leaking fuel and fumes than the old in-line vapor valve.
Living in CA, I have a couple CA bikes with the canister. They never smell when parked and the engine is hot. My two 49 states Softail bikes, will smell if parked in my little bike garage/shop when hot, especially after a recent fuel up.
If I park within a few minutes of refueling on my 2001 (my oldest 49 states bike) when it's fully warmed up, it will actually drip some fuel from the tank vent line. I suspect I need to change the fuel vapor valve on that bike, or at least stop topping it off if I fuel up just prior to parking it...
I would say what you are experiencing is pretty normal for a 49 states Softail, with just the old fuel vapor valve. I would say the hotter the bike when parked, and the hotter the weather at the time, will dictate how much gas vapors will come from the fuel tank...
When I looked up your fuel vent systems, I was surprised to see any new bikes still using that 1985 fuel vapor valve...
Last edited by hattitude; Mar 6, 2026 at 09:53 PM.
Thanks for that advice - injectors have not been checked but all vent tubes are clear. Less than a full fuel tank an issue?? I am afraid I can't buy that one. My other two Heritage or any other Harley never had such an issue. I always pull straight into the shop - fuel smell from the throttle body is normal and expected to some degree. I am talking about excessive fuel smell that requires opening doors and leaving the area. What worries some is that the H-D Service department is aware of this issue.
I would investigate very thoroughly the quick disconnect fittings at the fuel tank and the injector rail. Right after you pull in and stop, do a quick by hand and nose inspection.
It could be possible that after shut down, the pressure on the fittings is pushing the fuel in that line from tank to rail past an O-ring in either of the fittings. Could also be one of the injector O-rings that seal at the fuel rail.
CoolBreeze - reconsidered your response / pics and appreciate the explanations. Thanks.
However, there must be a reason why one out of my three has the issue - (2018, 2020, 2023). I am going to try a few scenarios and see if there is a difference. Yesterday was 79 degrees, filled up and when I parked, half a tank. Only a week ago, high was 42, filled up, nice ride, and parked with around 3/4 tank. The day I brought it home was in the 30's, parked with full tank. Fumes have been very strong every ride.
If the fuel vapor valve is a simple check valve, simple can sometimes be complicated. That valve is only $19.00 and seems like a starting point to me. Surely someone else has tried this too but I am stubborn in my old age. Now that I think about it, probably always have been! I have to get a new valve and dissect my original.
I would investigate very thoroughly the quick disconnect fittings at the fuel tank and the injector rail. Right after you pull in and stop, do a quick by hand and nose inspection.
It could be possible that after shut down, the pressure on the fittings is pushing the fuel in that line from tank to rail past an O-ring in either of the fittings. Could also be one of the injector O-rings that seal at the fuel rail.
Just my 2 nickels worth for you.
Thanks - you are second to mention the injectors. I did do a close inspection of all fuel tank fittings. I installed heated grips after buying the bike (removed fuel tank) and did a very close inspection after reassembly. But then I had the fumes on first ride home after purchase, also.
Since it started right after reinstalling the tank, that is a double for checking the QD fittings.
There are O-rings internally on both the male & female QD's, and also the mating to the fuel tank point. The injectors have a connector also with O-rings in addition to an O-ring to seal the injector to the fuel rail. One nick and there can be a small leak under pressure or even while flexing or vibrations. In a confined space, it only takes a few drops to stink like a gusher.
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Heritage gas fumes
