Greetings,
2000 FLHTCUI stock. I bought the bike uesed two years ago with 17,000 miles. Twice last year I noticed going down the road that the Speedometer was reading about half the speed I was actually traveling. After stopping and shutting it off, turning the ignition off and back on it worked normal. I've checked battery cables and the wires on the back of the speedometer and all appeared normal and were tight.

Anybody else heard of this? Thanks in advance for any tips!

 

Most bikes have a speed sensor in the tranny that picks up metal filings and causes the speedo to go wacky. Try wiping it off.

 

Not sure what it is, but had an 04 road king classic with the same issue. When I shut it off it would work correcty again.

 

if it is also registering half the miles, leave it alone...you will have a low mileage bike when you get ready to sell.