You need to tell us more, like:
1. does the charge light come on when you turn on the ignition?
2. does the starter actually crank the motor over?
or does it just click when you press the button? Or does it do nothing at all?
3. when you turn on the petrol tap and tickle the carbies, does fuel come out? Are you using minimal throttle opening? Depending on ambient temperature, are you using or not using the choke?
4. have you checked the amount of charge in your battery?
5. are your spark plugs the correct type and new or clean? (Remember that plugs that spark out in the atmosphere can fail under compression if they are incorrect)
Basically, if an engine has sufficient compression, the correct mixture of petrol and oil, and a healthy spark at the correct moment, it should run.

Phil
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