49cc Minibike, modification suggestions

Hey guys, recently bought a little mini/pocket bike from a second hand store, it is the first one I have ever owned. The engine is 49cc and I was wondering if there are any cheap and easy ways to improve the speed? if any more details about the bike are needed to help the best I can do is upload pictures beccause the bike came with practically no details, I don't even know the make and model.

If anyone can suggest some cool tips that would be great

Photos would be good. But assuming it is all still stock standard, The first thing I would be doing is replacing the stock carb with a 14mm delorto replica from a china watercooled.
Second would be a decent exhaust like a fat boy or wave type. Third would be strip the motor down, clean and match the ports and replace the Chinese bearings and seals. Also while putting motor back together i would recommend using a copper head gasket.

There is heaps of threads on the forum that have great ideas and tips if you do a search as well.