It's an old Honda 50... You could run it on pizza grease and it still won't die :lol:
Turbo's are useless are small engines, you'll have to convert it to EFI in order to effectively tune it. By the time you spend that kind of money, you can get a YX160 (SSR pit bike engine).
Also, this is the kind of thing that I was talking about by hand shifter.