Correct! Punchy, a member of The Stompers, gives Jim his good luck Navy watch cap he wore in Viet Nam. Here is a brain teaser; who got to wear Jim's watch cap besides him? Give up? ... see here

Side Trivia fact! The Hells Angels were going to be used as the M/C club but they had become incorporated, and wanted MGM studios to pay them $10,000 for using their name, MGM decided to use the fictitious name of The Stompers instead! Fact source is Birney Jarvis