What brand? Sparx and Wassell have their parts made in China and I fitted a Sparx 120w stator 2 years (7000m) ago and seems to be holding up well. The replacement Wassell fitted 4 years earlier overheated and started to char the encapsulation in my no oil belt drive. No sign of that on the Sparx. I tried to find out what insulation class wire is used in these stators. Class F or H, 155 or 180C would be nice but it's probably only B at 120C.