I wish someone would sticky this.
DONT BUY THE CHEAP CNS/RACING/NT/ETC CARBS !
If your going to spend money on a aftermarket carb get a 18mm Mikuni.
18mm mikuni carburetor items - Get great deals on eBay Motors, Asian items on eBay.com!
They are about the same price as the other carbs. They are tunable. Parts are simple to find. They been making carbs for years and years. They dont come glued. etc etc etc......
Break it in at 32:1 just dont beat the nuts off it. That means no full throttle till you get a couple tanks of gas threw it. If you have been running 16:1 with the spark plug that comes with the kit your bike is gonna run like crap balls till you get a new plug and move to 32:1.