hey, i have a rare form of the doodle bug called a baja racer is basically the same thing only its green. any way i want to know how far i can take this engine. i would like to get a better carb and exhaust. but i need to know what size carb to get. and can i safely run it ungoverned? and lastly are there any sights that sell parts for the 2.8 97cc engine?