Alright so I'm gonna dump a ton of pictures and try to do my best at somewhat of a step by step how-to rebuild a robin/benelli g2 engine. These are cool engines and are pretty simple to rebuild. I was a noob when I did mine and yall can too (had to do it twice, overheated bearings during install first time). Now these pictures are from 3 different periods of time that I messed with this bike so don't get confused as photo quality and backgrounds change. Hopefully this'll get some of you to crack them cases and do a rebuild.
This is where everything is gonna go. Those long lines with the c ends are the large circlips.
You're gonna want to take all the extras off before you remove the engine from the frame. DO NOT use a piston stop because of the angled plug hole. Either use the rope trick or a holder. Remove your intake (2 nuts) and exhaust (2 nuts and one mounting bolt). Next yer flywheel...