A smutty little gem “Sisters In Leather” (1969), directed by Zoltan G. Spencer (George Spencer Crilly) and starring Bambi Allen, and Pat Barrington.
A husband is blackmailed by 3 lesbian bikers after they spot him having sex with another woman in a convertible. They then take the man’s wife out for a picnic and some nude motorcycle riding. The husband finds some male bikers and together they try to save his wife from becoming a lesbian biker.