So being curious as to how loud my 42mm Gori pipe is I downloaded a free app to my iPhone and placed it on the floor about half a metre behind the tail can. Started and revved the scoot. Here's the unscientific results:
My 50 mm Gori was so loud I rode with ear plugs until I could stand it no more.
Sold that exhaust and fitted an NK road expansion, partially heat wrapped it and now it sounds fine.
No more ear plugs!
Ady
Spanner check the running gear before every outing, like in the Army. You know it makes sense!