I tried a 2 stroke walbro No24 and used crankcase pulse for pump but it could not deliver the fuel required so went back to original carb
Exhaust is a short pipe 50mm long.
I have 3d printed a new cam in ABS with higher lift and longer duration but have not tried it yet.
Yes av8tor1977's posts are full of good info especially with Ryobi , 2 strokes.