most likely it's a fuel problem, if you know how to get to the carburetor, pull the petrol pipe off it & see if there's fuel coming out. you might need to turn over the engine either by kicking it or on the push button start in order for the petrol to come out. if you can see petrol escaping then the carb is getting fuel which means the bike normally should start. post a reply & let us know what you found out.
steo
June 2009