i would get some carby cleaner spray it through every hole you can find,
then blow it out with compressed air if you dont have a compresser buy a cheap one (about $100 from super cheap) or just go to the local servo with a football needle plug it into the tyre pump and blow like mad make sure everything is clean then it should work good luck
p.s. if you buy a compresser there is a huge range of tools that come in very handy.....
