I've got a bike that's been sitting for a while (at least a year), and gas started leaking out of the caburator via the drainage hose. After doing a search on the web, I thought it might involve some blockage, so I decided to take it off and clean it. Cleaning went fine I think, considering I'm not mechanically inclined by nature, no mystery parts left over after putting it back together. The problem is, it still leaks. So now my question is, of course, why?