[martinjgooda]

Thanks Everyone, especially Wilf's knowledgable comments, for confirming what I suspected. I'll be fitting the 57mm Full 'zorst, Race Air Filters, PowerCommander in line with the standard 999S ECU and a suitable generic DynoJet map, next week. Then I'll book a dyno session to get it mapped for both cylinders. I'll keep everybody posted in a couple of weeks or so as I step along with the upgrade. I've also aquired an STM Slipper Clutch, today. I think I'll need it. . . . .
Thanks again
Um Bongo's & Sasparillos all round when I meet you. That's if you can catch me . . . . vroom . . . vroom . . . . . or is that RhuBarb . . . . RhuBarb