NOt to be a smart ass but how much gas is in it. Did you check the fuel lines if it started off on ether it should be able to burn the gas in the cylinder if its gettin any. You might want make sure your fuel lines are not pinched.The reason i ask how much gas is in it one of my bike would not want to run if there was under a quater tank of gas. If the bike sat for awhile you might have some junk that collected in the bottom of the tank and is blocking the petcock from getting fuel. Like paddleboy said you might need to rejet for the weather i live outside detroit and its cold as a witches tit out.