In short - I am new to scooters and I am not a professional mechanic. Having mentioned that - I've always been interested in mechanical things , I grew up on a farm, and since an early age I already got involved in rebuilding tractor- and other engines on the farm. At age 14 I managed to get an old Vespa scooter going - all by myself. The Vespa was a gift from my late grandfather, but was in poor condition. Nobody, included my grandfather ever thought I would ever be able to get the Vespa going. To everybody else's surprise I got the scooter going, and the scooter served me very well for at least four years.
I was farming myself for a number of years, and through the years I did all repairs and engine rebuilds on the farm myself. This include rebuilding off-road motorcycles that were used on the farm. Due to some misfortune I ended up working as a workshop manager for 18 years - designing and building industrial High Pressure cleaning equipment. I often got involved in repairing engines as well.
Since I got the Vespa from my grandfather about 48 years ago, I never stopped riding motorcycles, and I serviced and repaired all my vehicles myself.
During my lifetime I always regarded working on motorcycles, engines, vehicles, even scooters etc. as some kind of a "hobby", or "challenge - it gives me some kind of "fulfilment" in life -knowing that I am able to things I'm not suppose to do.
As far as my scooter experience is concerned - I know I'm still new and I only ride a small scooter. Many owners obviously owns bigger scooters, and have covered more miles on scooters than me. Without being arrogant - to my mind that doesn't necessarily mean owners with more "mileage" experience , scooter "engine size" experience, or number of scooters owned during the years always have the time, "technical 6th sense", or "finer knowledge" to sort out all problems.
In short - all engines work on the same principle. Anyone with technical "feel", or technical knowledge should be able to give advice on any given scooter. As easy as that. Electrical problems might be more complicated, but most owners should be able to give advice.
Personally, it never bothers me how other forum members express themselves. After all - my first language is not English, and I'm not even sure whether I always express myself "correctly". I've never been involved in "Forum Politics", and I will never be interested in forum politics.
My 2cents.