Was typing a long involved answer here but we're getting off topic in a way I don't want to

So back to the subject, diesel is unfortunately not a viable option yet, so I am looking at a used CG125, they are a known quantity and I could get a good used one a chunk cheaper than a new copy of unknown provenance.
65 mph (give or take) and an average generally of around 100mpg (although the one I used for a while for despatching was returning an *average* of 120mpg used for town work!) That's not too far away from some diesel conversions but with no insurance issues, spares off the shelf and everything easy...