We went for a ride last night to a biker bar/pizza place. Came out and my antenna was gone. Stolen? fell off? Doesn't look broken. Are they threaded on or what? Anyhoo total BS!

 

It is threaded on. Not likely that it just fell off on its own.

 

They are threaded. I guess it could have back out due to vibration but most likely some jackwad unscrewed it.

 

that's a pisser someone has to dink with someone elses stuff. but you can get a replacement shorty (or long one too) from AutoZone/O'Reilleys/etc for less than $16-18. A bit of blue loctite should help prevent future "removals"

 

Threaded with a set screw also.