ive got the 49cc jug. as far as i know i have the good(non restricted) header. i dont have to rotate the intake, i got a trick to make rizers outa masonite. plus i think a sha will fit, just real snug. then i can still keep shit under the side covers. lookin into the bigger carb tho, fo sho. plus the xtra tuning ability. its rainy today and its runnin sluggish like the airs too thick or something.