1939 Velocette KSS Special / MAC Special in Potomac, VA
1939 Velocette KSS Special / MAC Special.The marriage of a KSS motor with the more current MAC rolling chassis was a fairly common practice that resulted in a far better platform for the OHC KSS motor.39 KSS motor # KSS9121 and '54 MAC chassis # RS7479.No mechanical issues.
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