"the Fonz"

[Piute]

If you've ever wanted to sit on it ... now's your chance -- because The Fonz's iconic motorcycle from "Happy Days" is hitting the auction block next month.

The 1949 Triumph Trophy TR5 hasn't been ridden since the show ended in 1984 -- and for the last 15 years, it's been gathering dust in some motorcycle shop.

Auctioneers expect the bike to fetch in the $90,000 range -- which is shocking ... because the damn thing doesn't run anymore. And it's speedometer is broken.

The auction takes place on November 12 in L. Aaaaay

[MarkPBG]

It will easily get that price. Not so much for the value of the bike and its condition, running or not. That bike is a true piece of Americana! I doubt there isn't a bike collector that wouldn't try and snag it.