@Ian Parsons wrote:
The fixing of the inlet stub is not very clever on early Scotts as it relies on a clamp from the frame. Scotts also fitted gauzes on the transfer ports to eliminate spitting back but this will affect engine power. I don’t think anyone uses them now.
You are right here. I have altererd the clamping a bit. See image. It might be worth a check!
My air leaks (and weak running) were a lot less after this mod.