Yesterday I made a trip Porvoo-Sipoo-Vantaa-Espoo-Porvoo on 30-80 km/h roads with my original Honda CB750A and rather heavy sidecar Partly cloudy, no rain and +23 degrees Celcius.
Fuel consumption 13,5 litres, distance 204,5 km, max speed 91 km/h, average speed 55 km/h and average consumption 6,6 litres/km. Not so bad with a empty sidecar.
The engine is very "cold blooded", have to use choke the first 3-4 minutes. Converter is clinking and clanking at idle because of broken damping springs.
It is going to be a rather nice summer.
