So I pulled my old dirtbike out of the garage the other day and it started up on the first try, but it wasnt running right. The bike wouldnt run on its own without the choke on so i rode it a little with the choke on just so it could get warmed up you know, but from second gear up after a second of giving it gas the engine would act like it wasnt getting any gas and it wouldnt acceletate any more--its like i was taking away the gas feed when increased the throttle. Not only that but it wont even run without the choke, even giving it gas. After a few seconds the engine would do the same as above with increasingthe throttle. i dont know what the hell is going on. i put a new spark plug in the thing but that didnt have any effect. I'm not a mechanic and i dont knowthe first thing about any kind of engine so i guess I'll just have to take it to a real mechanic unless you all know anything about what the problem could be.