I have a used Saito FG-57T twin cylinder engine for sale.
1) Never a deadstick
2) 18:1 Redline engine oil-gas mixture used
3) Was fitted on my Revolver, here's the actual video: http://radiobirds.com/v-jeff-gp-revolver.html
4) Last serviced by Saito, Japan, and returned - now still in box
Asking price is $1000. Complete with brand new exhaust, original CDI, spark plugs and the engine itself.
For sound, check out YouTube or the linked video.