I guess EJ Potters Chevy and the Drag Waye VW would be the most famous car engined bikes,but there were quite a few in the 70s.The Imp engine seemed a popular choice,all alloy ohc 4 cylinder and the scrapyards must have been full of them.Here's a few starting with Moonraker from 66 which featured an English built flat 4 AJB engine.
1a CEB 3a.jpg (105.33 KiB) Viewed 1970 times
1a CEB 4a.jpg (98.4 KiB) Viewed 1970 times
0a CEB 9a.jpg (75.52 KiB) Viewed 1969 times
0a CEB 10a.jpg (41.74 KiB) Viewed 1969 times
0a CEB 11a.jpg (65.73 KiB) Viewed 1968 times
1a CEB 7a.jpg (44.02 KiB) Viewed 1967 times