Speedo problem on 07 fatboy - FLSTF Fat boy Harley Davidson Motorcycles

they are part numbers not DTC code numbers

My '04 Fatboy speedo does the same thing. I leave it in the sun for a while, the fog evaporates. Because your bike may still be under warranty, there's a chance the factory will replace your speedo.

Best is to ask at an H-D parts department.

Probably a bad Turn Signal Module located under your dash speedo...remove your dash and speedo then you will access to the module.....

Try inside the tach on the connector. But also remove your speed sensor on the transmission and clean it. They pick up metal chips from the trans and short out. Also, HD had a bunch of bad speedos around your year. They replaced them for free. Doubtful they will replace yours at this late date. You might end up buying a new speedo.

replace speedo cable,more than likely broken inside covering

For clearence for wider rear tire.

If you have the electric speedo, then it's one problem. There is a relay that all three of these go through in order to work. I'll bet you popped the relay. I don't know exactly where the relay is, but your local dealer can give you the location. If you have the manual speedo, the it's two probs. First, the cable to the speedo gear on the front hub has most likely pulled out a bit, and second, the same relay as before, only the speedo isn't routed through it.