[_Stretchie_]

What model is it? Check the kill switch (We've all done it, if I leave the kill switch set to 'Off' but try to start mine it does the chugga chugga and sounds like it's trying but never fires) and change the fuel

Engine wise they are all pretty much the same. Mine was stood for a couple of years, I could get it started but it would just die after a bit so I stripped the carb and just cleaned it all with a can of carb cleaner.

Is the choke on the bar or under the tank on the carb itself?

If it is on the carb itself then it should have three settings, down, middle up.
Up = On max - If cold or not used for ages then have it on this setting, kick the bike over and hold the revs at about 5k for 5-10 seconds, then put down to middle setting
Middle = Half on, hold the revs at about 5k for 5-10 seconds then back off the throttle slowy to see if it dies or if it stays on
Down = Off