Finally i got the main jet kit from battlescooter, i am impress it is great and the t-shirt is wonderful, so i was able to finish my air intake, first a list of supplies
1 5/8 mandrel bent exhaust j-pipe (you can get them from jegs or summit for about 13 dollars)
k&n type fabric air filter with a 1 11/16 flange (you can get them from any go kart part supplier for about 10 dollars)
Any radiator hose with an inside diameter of 1 5/8
Flat piece of sheet metal for the bracket
just cut two pieces so that the straigth tube is 11.5 cm (4 1/2 inches)and a section of the bent cut at a 45 degree angle, in one of them you need to solder or epoxy a couple of fittings for the hoses, i fabricated them out of old gas filters, cut two small section of the coolant hose so you could attach them together and to the carburator
the bracket was kind of tricky but after bending some cardboard and cutting and trimming untill i was satisfied with the fit i made a template so i could transfer it to a piece of sheet metal, if you have any problems maybe later i will post the template, i also had to trim the rear fender so it will clear the filter
I had to rejet the carb to a 90 main jet to get the motor to run smooth, boy i am happy, it picks up speed a lot faster and the sound alone is great, now i need to get one of ruckass mufflers and this ruckus will be perfect, any way a before and after pictures