ORIGINAL: DerFly
MVVS 61 also a good candidate though not exactly freely available these days, they can readliy be had. I have one NIB with an aftermarket YS carb and regulator originally marketed for the Webra Speed - remember those?
I also have matching pipe, curved and straight headers, plus enough spares to rebuild if I wear it out or rotate the exhaust.
DF
Thanks for the reminder. I too have one NIB, along with the factory Diesel head and the tuned pipe and header. Never got around to flying it before my health went South, so to speak.
Mine has a squarish cylinder jug and is a beautifully made engine. I can't remember where I bought it. It might have been Dar Zeelon or Pe Reivers.
Ed Cregger