I've got one of these on order from alibaba:
Zs172fmm-6 Zongshen Motorcycle 4-Stroke Air Cooling Cdi 250cc Engine CB250r with 5-Gearshift - China Motorcycle Engines and 250cc Engine .
I looked at building up my condor 150 and then realized this was the most bang for the buck. A 22hp Baseline.
Here is my build:
https://www.chinariders.net/showthre...ewpost&t=33747
Keep us updated!