My speedo has gone wonky about 6 times, it climbs about 120mph or higher if let it. Usely I come to almost stop and it goes back to normal. Before thought it to be speedometer but last time it howled so was so wondering if it might be cable or worm gear at wheel. Posted in this section as most the twin cams are electric.

 

Clean your grounds.

 

Sounds like a good idea, this started about the same time radio stopped. I then found ground wires that where unhooked on the tree after tracing schematic, & hooked them back up.

 

'Howling' sounds like it's mechanical.

Alan

 

So which of the three do you think it is. I don't see alot of speedometer on eBay like mine so would have to get new if that's what it is.

 

Well that's nice but why post in the EVO section just because twinkies are electric????

 

Because mine is not, one of the few. Thanks for the help

 

You can oil your speedo cable which will also oil your speedo drive gear but if your speedo his howling then about all you can do is replace it.
Have you checked your local dealer for part availability?

 

Have not checked dealer yet. It is listed online through. It only does it every couple of weeks and it did set in a down pour out of state when it started in June.

 

Intermittent problems are the hardest to find.