A gasket is defined as: "Any of a wide variety of seals or packings used between matched machine parts or around pipe joints to prevent the escape of a gas or fluid."
There are plenty of gaskets on mopeds. If the part the gasket is sealing, like a transmission cover, has never removed, you are almost SURE to break or rip them the first time you remove them. I've tried plenty of times to just "go without" gaskets but it doesn't happen! You will leak fluids or gas everywhere and be very ashamed of yourself. Don't sweat it though, because gaskets are easy to make:
If your gasket rips, some old paper may have stuck to the existing surface, so first thing to do is make sure you remove all that excess debris.
Now, go to the hardware store and buy a roll of gasket paper. The kind I most frequently use is the black, fibrous paper about 1 mm thick. Roll the gasket paper out flat on a good cutting surface, NOT like your driveway. Coat the edge of your part (in this case, a tranny cover) that will be in contact with your gasket in an oil of your choice. Then, firmly stamp the part into your gasket paper, leaving an imprint and wet stamp of oil for you to trace by. This oil WILL go away after a while, so trace what is there with a marker if you feel like you will take a while. Use an exacto knife to cut out the lines you just stamped. Make sure this knife is sharp and new: if it isnt, you will likely rip your new gasket with the tension you create by dragging a dull knife across the paper. Use a single hole puncher to punch out screw/bolt holes, or a knife if they are too large.
And thats it, pretty easy. Remember, it's always better to leave a little too much material instead of too little. You can always go back and cut more if you have to, but you cant put it back after you cut it off!