Re: I finally got one
Welcome to the forum. You did good on price for the bike. Congratulations.
The engine is the common Chinese 2 stroke. You'll find them under many brand names but essentially they're all about the same. There are minor differences but nothing that hasn't been covered here many times. There are different carburetors, the most common is the NT or the infamous CNS. Again, lots of information here on both. Try using the search feature for questions by typing in a keyword/s and you'll find plenty to read on every subjet associated with motorized bicycles. If you can't find an answer there's always someone ready to offer help or advice.
Use a good 2 stroke oil formulated for air cooled engines, make your ratio 32:1 gas to oil, and above all ride careful and keep a close watch on those fenders. They can, as you've found, be a source of problems, some dangerous.
Good luck, have fun.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"