Jenny Gan stars with The Monkees in "The Wild Monkees". In episode #42 of the second season the lads find themselves face-to-face with a notorious biker "gang".
The Monkees try to impress four women that turnout to be the "ol' ladies" of Butch and his fellow bikers. Butch & Co. eventually challenge the boys to a motorcycle race. Winner gets the girls. Mickey, Peter, Mike and Davey dress in leathers, bikes appear and hilarity follows.
Mickey is shown riding a 1967 Triumph Bonneville, Butch has a rigid frame panhead with a 4" over wide glide, cool looking old school chopper.
Jenny Gan made such an impression in the role that she he began a "professional association" with Roger Corman. In 1969 he put her in "Naked Angel", she played a biker chick, clad in leather and lace, it was a stretch but, she pulled it off. Corman thought enough that he cast her (co-star, actually) in 1971's Women in Cages.