I'd stay clear of those cheap knock off carbs. I was recently given a four stroke 4 wheeler from a friend who needed it out of his place. Apparently it had sat for years, someone tried to fix it. Instead of rebuilding the OEM carb they put a knock off on it which apparently worked for a bit. I was told, when it runs, black liquid that smells like gas comes out of this here tube!!!!

Needless to say that tube was the crankcase breather and what was coming out of it was oil and gas from the crankcase. The carb was letting fuel run right into the crankcase. Luckily it wasn't run very long so we don't think anything was damaged, it was just washed real good. My buddy and I managed to fix the carb, because the OEM carb was not around. The oil was changed several times and it's ok now, but we are recommending to the person who currently has it that they look for a used OEM carb.

So bottom line, I am strongly opposed to knock off carbs or any other knock off parts. First, they are stealing the OEM design and second they are making junk. That's my input.