Possibly of interest?

[Bikeguy Joe]

I saw this while looking for something completely different...it was listed in Asian Automotive....
http://cgi.ebay.com/ebaymotors/49cc...QitemZ190302808067QQptZLHQ5fDefaultDomainQ5f2

 

[Motor Boys]

I got this on my bike I wrote a post on it awhile back, it is basiclly the same as the stock carb, I even bought it from the same guy. They have no adjustments that can be made just like stock carbs.
http://motorbicycling.com/f13/pocket-bike-carb-13048.html

 

[Bikeguy Joe]

Thank you for the clarification, that's exactly what I was wondering.