42F a cold start! That's a summer in Scotland!
I'm very impressed with your fuel injection system, we started doing something similar at college to an old Robin Reliant owned by our lecturer, we got half way through before deciding just to stick an old Yamaha R6 engine in it instead, but hey, that did have fuel injection!
Needless to say it was difficult to drive, the clutch in particular proved tricky, they are after all designed to be used with a lever and not a rusty pedal!