The real Dan Saxon was an extra in the movie.
When SID goes to the San Carlos run, producers gathered more than 20 different biker clubs to join in.
Robin Williams had an uncredited role as the groom during the biker wedding. He was hanging out with Charlie Sheen, who invited him to set. Robin accepted as long as he could work under a different identity, uncredited, and under heavy prosthetics so as not to land himself in hot water with Disney. Robin said he enjoyed having "a day off" from himself.
This film was released in the UK as "Fixing the Shadow", a reference made in the film with the Native American folk tale.
At 1:28:47 you can clearly see that bloods pistol has not ejected the round completely after shooting the convenience store attendant.