Hey all, My honda CB250 won't start. I've tried everything I can think of, and that has been suggested in previous similar posts (short of cleaning the carbs). I have limited mechanical knowlege and skills. Background: Bought a 1992 Honda CB 250 few months back and didn't get round to doing q-ride til recently. The bike sat with a tank full of petrol (yeah i know, whoops) without being ridden. The battery was also dodgy. What I did: Replaced the battery with a new one (charged it too), drained the fuel from the tank and bike and replaced with new fuel, took out the spark plugs and they looked fine. What happens: It doesn't start up. The electric start sounds fine, but it just doesn't start. I am very stumped. Is it time to take it to a mechanic? Do the carbs need cleaning and can I do this myself? Help. Thanks in advance for your help, drew.