OK, job done and it took about half an hour including getting the tools etc etc. Mine hadn't failed (yet!) but at 20,000 miles I thought it has had a few on off cycles in its time.
I was amazed how hot it actually gets in use. See the pic of the yellowing Honda plug due to that heat!!!
I was going to use the original spade terminals and eased them out OK from the connector block (small screwdriver in from the front to raise the plastic tang) but decided to go the route as advised due to the close proximity of these terminals and the need to insulate them etc. So soldered ends and crimped terminals using a proper ratcher crimp tool that won't release until the correct pressure has been applied. Not an expensive tool, but oh so much better than the cheap-jack ones I've seen around.
I used the original top mounting position and angled the R/R so as to:- a) leave the indicator relay on its original mounting position, b) allow the possibility of the bikes forward motion pushing some air through the fins (not a lot but better than nought), and c) the terminals are angled down to the rear so less chance of water ingress. I think this is possible here due to the R6 unit being slightly less long and having angled corners when compared to the R1 unit. The central 'potted' component part on this R6 R/R is the same size as the Honda one (but who knows what's inside that black blob?).
All fitted as per the superb sticky so a big "Thankyou" there to 'Beast'! Only other thing needed was a longer bolt for the single point fixing as the originals are too short!
And now
