He competed in British and American motorcycle road racing events from the early 1960s until the late 1970s, most prominently as a three-time AMA Superbike National Champion.

[2] He became part of the Café racer motorcycle culture centered around the Ace Cafe in North West London.

[2] Pridmore grew disenchanted with the deprivations of post-war Britain and in 1964 he and his wife made the decision to sell all their possessions and move to the United States.

[2] He soon began competing in local motorcycle events, riding a 125cc Bultaco previously raced by World Championship competitor Ginger Molloy.

[1][2] With the aid of talented engine tuner, Udo Gietl, who had previously worked in the Apollo space program, Pridemore was able to transform the staid BMW touring motorcycle into a purposeful racing machine.

[2] He posted a series of consistent top-five results to successfully defend his title ahead of Ducati rider Cook Neilson.

[2] Pridmore went on to win his third consecutive AMA Superbike Championship in 1978 riding for the Vetter team, again on a Pierre des Roches prepared Kawasaki.

[1] Pridmore and his Ventura, California-based RPM Motorcycles shop attended several of the South Coast BMW Riders Club's Fiesta Rallies in the early 1980s.