Thanks Martin, do you find that the TEC cam reduces revs as well as provides more power? Obviously I don't know without having ridden one, but I don't think I'll mind the higher gearing as I don't plan on going fully off road, I just like exploring lanes (and the roads around here are terrible!) Do you know if the cam upgrade voids warranty?
For me, no. It depends how you ride of course, but I've come to the conclusion that the rpm I ride at, i.e. change gear at etc., is dictated by how the bike feels, not how much power it makes.
When I first put the cam in, I shortly after fitted the 16T sprocket and would have said that it allows you to ride at lower rpm, but after 6000 miles with the cam, I have found I prefer to keep the revs as before, but maybe use smaller throttle openings.
That's personal .....others may prefer something else.
I prefer having more power on hand for hills headwinds, two-up riding etc.
I think the only way you'll know what's right for you is to try things, you're bound to get conflicting opinions. There is no one right path, and remember, the stock bike is fine, so it's all gravy.
As regards warranty, it's definitely going to void it, but they'd have to spot it and unless they strip the top end, how will they know?
So for claims other than engine related, you'll be fine.
Personally I've given up expecting warranty support from MotoGB and their dealers anyway, after some terrible experiences.