Like Frank, I am a member of the ‘one carburettor per engine is sufficient’ club, as was Burt Munroe. In the late 1970s I acquired a 1962 Triumph Thunderbird that was quite nice, but nothing special. It had been Bonnevillised by some PO, with a twin carb head, high comp pistons and big camshafts. It went well when you managed to start it, but you could never tell when it would. I reckoned it depended on how many people were watching: if you multiplied the number of observers by four, that is about the number of kicks required!
A few years ago, I stripped the motor, put in some softer cams, made a spacer and fitted it under the barrel to bring down the compression ratio, and fitted a single…
