ERRR. I just closed the tab that I had this post made up on.
As a result, I'll be splitting this post in to several so I don't bone it up again.
I picked up a small china built 100cc gasoline children's ATV at a scrap yard with the intention of converting it to EV as a birthday present for a particularly small 7 year old boy.
On disassembly I discovered that the motor had been previously dissembled and was obviously crap + shot. I did however find some nice features like hydraulic disc brakes and fluid fluid shock absorbers. Fairly ideal for the purpose.