Every year there is an event put on in San Francisco that invites folks to present their cheapest running moto.

Many of these owners/builders spend up to a few weeks putting together a worthy machine.

This was the 5th Anniversary of the San Francisco Dirtbag Challenge.

The rules are simple…

- No Harleys.
- $1000 total budget (for you numbnuts out there that's one thousand dollars, including the bike).
- Must be able to ride for at least four city blox.
- One month build time.

In the event of a tie, the bike ridden the farthest to the Dirtbag will win. Thassit.

The Site. (Potentially NSFW)

Stolen from m0t0-ryder