Zenith 1926 Model “6-80” 678 cc JAP side valve V-twin frame # 9590 engine # GT/A/44028 Zeith machines were manufactured from 1904 till 1950, in a variety of factories in or around London. From the early days proprietary engines were used, such as Fafnir, Green-Precision, JAP, Bradshaw and Villiers. The latter engines were used in most models from the thirties. In pre WW1 days Zenith machines gained many successes; driving force was chief engineer Freddy Barnes, who was responsible for the famous ...