Hi. On my warmth Lima, I start the engine with the choke full out, and, after it, I reduce to a third (summer, 25-30 C=Celsius degrees ) or half choke (winter 14-16 C)). Soon, I wait near to one minute (waiting to the thermometer needle start to move - near 80 C on engine - my thermometer is not the green original). After it, I start to drive. I put the choke all the way after the engine temperature goes near 90 C (the engine thermostat open full at 92C), usually, it happens just on the last semaphore stop before the highway (driving the car gently - less of 50 kph - 30 mph - one minute delay).

btw, before the B18 overhauling, was impossible to drive with choke out, total or partially (engine dies).

Happy volving!