i got a 2000 blaster that i picked up, and it runs but wont idle. wen i got it two days ago it ran but kinda was choppy and broke up wen givin gas. so today i added fresh gas cause it was sitting for 6 months and new oil, and i changed the spark plug. then i just sprayed into the carb with cleaner and after a few kicks it started n i drove it for about 10 minutes and it got cleared up and rides smooth and has power now. but it still will not idle for sh*t. i adjusted the screw but it doesnt do anything. anything else i can check for? i was thinking about taking the carb about and cleaning it real good, and also i was thinking about if it could be a vacum leak. i got a hose from the bottom of the carb thats about 8 inches long going to no where and gas sometimes drips out. wat is that for? any help will be aprreciated. thanks