Motorcycle and Scooter appreciation

That's Ace! Mechanical stuff I understand and usually have a good approach to fault finding, electrical stuff I know start it all does but when it stops doing what it's meant to I'm stumped.
Handy to have a methodical process to work through.
From what I've already done Im fairly sure it's the stator. It might have been working barely until I reconnected the regulator then it went into full failure
Went to a motorbike garage just after work, round the back of a railway type place and they were very quickly stumped, suggested for the cost of small cheap bike parts just replace them, probably only worth getting proper mechanic to look at it if parts are in the hundreds, makes sense.