If no one with 2 strock petrol engine drowing will be able to give me .
2 Answers

I'm not sure on what you actually want.
Maybe something like this?
https://grabcad.com/library/piaggio-si-50cc-2t-engine-1/files
I'm not sure on what you actually want.
Maybe something like this?
https://grabcad.com/library/piaggio-si-50cc-2t-engine-1/files