So, moving on!:
In case people of forgotten: original issue here is my battery drained flat mid journey. And weirdly, my indicators (that I put on) keep blowing their 10amp fuse mid journey (but not in garage), but a 15amp fuse is fine. I've taken a wrong turn with the 'readings moving around' (very embarrassing).... but I now have a better set of readings (taken at the battery terminals - with a new battery) that are shown below:
7.9v > 10 v at low tickover (higher end of this range when all electrical items are turned off, decreasing down with each item that is turned on i.e. the lowest reading is when lights, indicator and footbreak all turned on: 7.9v)
8.2v > 8.45v at high tickover (this time higher voltage being when all electrical items are turned on(!)).
8.8v > 9.2v at high revs (higher voltage when electrical items turned on - but couldn't work out how to do this with the footbreak too - not enough hands / good enough balance!)
So the question is: is that normal or, as it instinctively feels to me, a bit too high (as an average). Similarly, should there be this amount of variation - since I expected the regulator to just 'regulate' everything at about 7.8v all the time (unless the dynamo couldn't deliver enough to match the pull of electricity - perhaps when 'everything' is turned on, or revs drop below a certain range - in which case it would drop suddenly to something less than 6.25v).
Given this, an observation that seems very odd to me is that from the moment the bike is running the voltage jumps markedly from the 6.25v resting to something around the 9v - 10v mark) i.e. if I'm reading it right the dynamo is 'always on' and 'always delivering (a lot of) charge to the battery'. But surely that's just impossible?!
So... very.... confused.
Cheers all and apologies once again for wasting people's time with earlier post!
Sam