I have a Willie-G Chrome Gas Cap and LED Fuel Gauge that came off my 2011 Street Bob. I recently bought a Gloss Black 2019 Road King Special and want to use the cap and gauge. The cap works fine but the Fuel Gauge, according to Harley, fits ’08-'17 Road Kings. The only gauge Harley sells that fits the 2019 Road King is the Flush-Mount fuel gauge. That says it's compatible with '08 and later Road Kings. I really do not want to pull out the stock gauge without knowing if my gauge will fit and work correctly.

1. Does anyone know why the Willie-G Gauge is not listed for 2019 Road Kings?
2. Has anyone successfully done this on their 2019 Road King?
3. Does anyone know of any 3rd party fuel gauges that work in 2019 Road Kings?

 

I believe the '11 was still pretty much an analog wiring system while 14 and newer are CAN-BUS. My GUESS is that the gauge will not interchange.

 

One of my mother's famous sayings (in our family anyway), "To each, their own". With that said, you're planning a $10K purchase on whether it has a gas gauge or not? My 94 RK has one, I think, but I don't know as I've ever looked at it. My tripometer is my gauge, once it hits 150 (4 gallons at 37.5mpg), I'm out of gas unless I swing the reserve. If/when it hits right around 187 (5 gallons at 37.5mpg), I'm sitting on the side of the road waiting for someone to bring me a can of gas.

 

old thread: but posting answer cause we scratched our heads as to why the 2018+ was not listed as compatible...and the stealer was hopeless, when asked.

A1: no idea, says multi fit up to 2017 on the box

Willie G. Skull LED fuel gauge
Part Number: 70900781
Fits ’09-'17 Dyna®(except FXD), '08-'17 Softail®(except FLSTNSE, FXCW, FXCWC, FXS, FXSB, FXSBSE, and FXSE), ’08-'17 Road King®and ’15-'17 Freewheeler™ models.

A2: did it on a 2018 Road King Special FLHXS, yesterday

A3: at a guess: as the 3 pin gauge wiring goes into the H-D loom (it passes through the tank), I suspect the science part is done in the ECM, perhaps.
DAKOTA DIGITAL must make something (I have gauges on my FLHXS and the fuel gauge works fine)

was a breeze to fit and works a treat!

Your Mileage May Vary