Honestly if you a good performance boost on the cheap pick up the 19mm manifold adapter they sell on this page
http://www.affordablegokarts.com/mm5/merchant.mvc?Screen=CTGY&Category_Code=99cc
You can buy the 19mm Carb from them, but u can pick it up from eBay for half the price.
The slide means you don't have to use special throttle linkage and its meant for motorcycles, unlike the stock Carb that's meant for stationary situations and doesn't handle changes in agngle well when turning
Then with some tuning and a good exhaust the engine really wakes up.
http://www.affordablegokarts.com/mm5/merchant.mvc?Screen=CTGY&Category_Code=99cc
You can buy the 19mm Carb from them, but u can pick it up from eBay for half the price.
The slide means you don't have to use special throttle linkage and its meant for motorcycles, unlike the stock Carb that's meant for stationary situations and doesn't handle changes in agngle well when turning
Then with some tuning and a good exhaust the engine really wakes up.