Found whilst just surfing:

[Ludwig II]

http://tjdebon.en.made-in-china.com/...e-Dgb-006.html

http://image.made-in-china.com/2f0j0...ke-DGB-002.jpg

Toe in the water, anyone?

Don't fancy a Chinese? How about Korean? http://mbabike.en.ec21.com/Motorized...6_1613437.html

 

[crassius]

dunno, maybe if we had the whole link?

 

[Ludwig II]

I'll look for the Korean one as well, but this is the site for the Chinese bikes. There are a few petrol models interspersed among the bicycles and seeds and instruments of the devil, sorry, electric bikes.

 

[Ludwig II]

I got the products pages for these: http://tjdebon.en.made-in-china.com/product-list-1.html[/url]


I couldn't find the Korean one again, but look at this little treasure house: http://www.cnmotorkit.com/html/products.html

 

[crassius]

I see a 50mm piston in the 80cc kit at cnmotorkit & several pre-built bikes at tjdebon - both places seem interesting, but without looking more closely, I'd guess that orders would be placed in wholesale quantities.

nice find

 

[Ludwig II]

Emails sent out asking, I await results.

 

[Fabian]

If they offer a "true" 50mm bore size, the motor bicycling community will bulldoze a path to their door!
50mm bore size and a true 80cc is like finding the holy grail for motor bicyclists