Welcome aboard, tell me you did not cut the exhaust off, you need the exspansion chamber, to get max power. So, it runs, if its old its probably a 47cc ( 43cc ), the 49cc is ( 48.7cc ). I have 9 bikes now I believe, it keeps you busy. We have all broken bolts and so on, so don't feel bad. Takes alot work to keep these bikes running good. Its hard to get these tires off & on, I just got a small tire changing machine for 4 to 12" small rims, haven't used it yet. My X18 10" rim I took to the tire shop. You can get a new gas tank for $20, its Chinese plastic, not the best. Online at pocketbikeparts, in Florida, they have icons of bikes and engines and its easy for a new comer to find parts. Yours is either a MTA1 half fairing, or MTA2 full fairing Cagllari Daytona. They have alot of names but alot of the engine & other parts are the same.