When I got my fatboy it had a solo la pera seat with a plastic plug in the fender hole where the passenger seat bolted to. I'd like to run the stock solo/passenger seat combo sometimes but when I removed the plug there are no threads to screw into. Just a hole. Any ideas? Or just get a nut and washer that fits the seat bolt?

 

Looks like you need a seat retention nut.

http://www.jpcycles.com/product/8200095

There's also a you-tube video.

 

Youtube seems to have how to videos on just about anything you need anymore.

 

Perfect! Thanks guys

 

They sell them at parts counter. Really cheap buy a couple for spares.