Has anybody out there found the definitive out of the box bolt on performance carburetor for a 80cc (67cc) ? I have read all threads I can find and even jumped on a cheap carb listed on ebay that turns out would require too much adapting to be practical. New/used doesn't matter. I'd rather pay a little more to get one that is proven to work than keep taking shots in the dark. Tinkering is fun, but I’d rather ride.