Clews Competition Motorcycles or CCM for short, is a British motorcycle manufacturer based in Bolton, England. CCM was born out of the collapse of BSA's Competition Department in 1971. Alan Clews, founder of CCM, was a successful Trials and Scrambles rider in the late 1960s. He wanted a lighter, more nimble and modern motocross bike, like the BSA factory engined 500 cc works specials. When the BSA Competition Department went out of business, he saw his opportunity and bought all the works parts that were available. Clews started building motocross bikes in his garage. Not having works engines just made Clews develop his own extensive improvements to the standard BSA B50 500 cc engine which could be had by breaking up existing BSA B50 MX bikes. His reputation grew as a builder of four-strok