RE: RCGF-150cc
There are a few DA 150's listed in the classified sections of various forums. With a little searching you could obtain a very nice 150 for about $1,000.00 U.S. If you want light and very close to equal power then a BME 150 might be the ticket. The BME costs more than a used DA though. What's nice about the DA is that it seems they continue to support their engines even after one changes ownership. I would avoid just about anything sold on E-Bay. Too much room to get screwed, and the possibility of something being a stolen item is higher than it should be. In any case, get the serial number of a DA and check it's update history. The 150's had a front hub update early on.