how can i fix my peugot speedfight 2?

Any suggestions what could be the problem with my speedfight, it was all workin fine until fell of it n then i picked it up and it wouldnt start, all the electrics are working fine, i thought that cause it was on its side for a bit i need to pump the petrol through again but i tryed this and it didnt work, n e ideas i would be gratefull for :) arron