08-02-12, 12:52 AM
A few 10's of cc's of fuel in the carbs will evaporate quicker than a few litres or gallons in the tank, leaving behind a higher concentration of the gunky green additives that they add. You are of course correct in saying that starting the bike for a brief period without getting everything thoroughly warm isn't that great an idea. Burning petrol produces CO2, harmless for an engine and H2O (water) which isn't, it will sit in the exhaust, may get in the oil, neither of which is good. Start the bike when you're gonna ride it. Just my 2p...