I have a super original Allstate Sidekick trail scoot with a B&S motor that appears to be as old as the bike. The numbers stamped on the motor are: 81302 943902 6105160. What do these tell me? I need a carb rebuild kit, and a refresh on the rest of the motor would be ideal. Not trying to build a hot rod, just as accurate of a restore as possible. Any guidance will be appreciated.