I have a 80 Motobecane with a Gurtner carb on there and I can get it to run with some starter fluid but it will not stay running. Then after I keep it running for a while it will flood the engine and wont start until I pull the plug and air it out. Should I just get rid of the Gurtner and replace it with a Dellorto? The moped is completely stock, but I might add some parts. If I should just buy a new carb which one should I go with and with what jet?? I appreciate your help thanks guys!