are you running stock carb and airbox, or do you have to use hiflow filter for expansion chamber to work right? it seems like i have been advised both "get a unipod" and "dont mess with stock airbox". does elevation play a big part in advice from people around the country? i'm about 50 feet above sea level, fyi. can i get away with only upjetting? finally got my carb gasket set so i cleaned my carb for the first time tonight and saw i have an 85 jet. i also ordered whatever jets they could find that fit, i got an 80. are there bigger jets made for this carb, or do you always end up drilling yours? i tried my new pipe (pocketbike chamber/nu50 header) on my otherwise stock urban but it barely ran, giving slow, heavy puffs of smoke and the sound like someone slowly tapping a cowbell coming from the silencer, and would barely move at WOT, so i replaced (clogged) stock one until i get all the parts i need. i think running slow and smoky means running lean, since it would only run if i held the throttle open a bit. or do i have it backwards, was it bogged down coughing oily smoke and gasping for air? i looked at performance spreadsheet, but the only NU50 had a 70cc kit.
yeah, my first ped, if its not obvious.