The past two times at work I've brought my bike its been sitting in the sun all day which isn't good for my paint but shouldn't effect engine starts should it? Passed two times if tried to start the bike at work. She will crank and fire and then almost backfire and spits smoke out the air cleaner. 99% of the time she cranks and fires up without a hitch, specially in the morning in the garage. after it stalls and I go to start it again there is a hesitation on firing then when it does fire its fine. Is there something to worry about here? Facts: I did put in fuel additive before winter storage. I have since ran the tank empty and have refilled with fresh high octane and am now at the half way mark on the new tank. Thanks guys.