Thanks Carbon, yeah it is pretty good going and I am quite pleased with it. Thats with fairly varied riding from tootling around to giving it large handfuls on the A roads. Looking at the plugs they are showing a good but perhaps a slight lean condition but wonderfully clean. So, I may be able to go up another main size. However, I can accelerate very well and touch the ton if I need to to, so I am not sure if there is any point other than curiosity of what can be acheived.