This is a manco streaker built by sears roebuck ,,1982 or 1984. Was advertised in the sears roebuck add ,,showing Kelly earnhardt on the Daytona track with its protégé gocart lineage,, my question is, is the rear wheel I have on it the original one ?? It's a 60 tooth sprocket , I though thats a gocart number ? the engine is a Briggs 3hp ,the original I thought was a Tecumseh? can someone please help me ?? thinking of selling but I need to know more about it first . Think you in advance.