I tend to agree with Mr Gazza and Utopia. I've been riding carby bikes for many years and have never had to strip carbs to start a bike that was laid up. Fresh petrol and a well charged battery, making sure the battery connections are tight as there's a fair current flowing which will heat up and melt any poorly connected joints if you have to keep it spinning for a bit.
What i have done many years on first start up is set a hot air paint stripper a few feet from the bike pointing at the engine for an hour or so before starting. They always start first jab of the button, just as if they've been ridden within the past hour or so. A hair drier might do he job too, it's just about raising the temp of the motor a bit.
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