there is no such thing as a 47cc, it is just another way of saying 40.2cc,
just to explain, in the engine there is a wrist pin, if the wrist pin is 10mm the bike will be a 40.2cc(other known as 47cc)
if the pin is 12mm then it is a proper 49cc.
nu_age_ware is the only seller i know on ebay who sells 49cc bikes.
but another good seller is" dmmcimports"
the bikes aren't 49cc but they are really quick, well-built and reliable.
hope this helps, btw to get a good bike you will have to pay more than $250. if you find one on ebay for less than $300 it is likely that:
it is not 49cc
not reliable at all
will fall apart
wont last long
i have a bike for sale that has been used THREE TIMES ONLY!!!!
i bought it for $360, here is the link:
http://www.pocket-bike-racing.com.au...about5669.html
if ur interested, PM me, im in sydney, willing to ship