Moped Army

I know how to work on engines but i just dont know too much about specific parts (brands) for the e50.

whats the best setup:

kit, head, crank, carb, pipe

who makes em? Availability? Where can i get em? treats?

thanks, you guys are true masters. Ive been beating around the forums trying to find a difinitive answer, but everyone seems to be on a budget or cant agree on a specific setup or combination.

I just want to do a solid build that will last me a long time and get me there fast.