Vicente, I used to have an 850 T160 and now have a P&M 850. It makes the engine more tractable over a wider rev range, so it is more responsive at lower revs, for example in traffic . The P&M is mostly used on the road but it still revs very freely, delivering plenty of power for track use as well. I’d recommend it.
Thanks for replies, David and Peter. I will seriously consider an 850 kit for the future. With taller gearing it should give more relaxed cruising as well!
I did enjoy riding the RGB very much, Peter. It’s a special bike and I feel very fortunate to have had the opportunity!