Thanks, you may use any picture as you please…
Around 18-20C now… mixed (british-like) weather…
A side-note…the side-stand-warning gets 12V from the “old” bypass-connection.
Headlight draws from the battery (via a 30A fuse) to the relay. Wiring-colour is what I had…using a pre-wired relay-holder…
About exhaust; I was a bit surprised on comparing dimentions on 125 vs 250 pipes. after cleaning up the ugly, restricting weld on the entrance, I measured less than a mm difference, just difference in 7 years production..? So, no clear advantage on swapping a 250 system on a 125. B.W. pipes are superior, (but a bit large for best power on a 125). The welds on any stock system should be grinded/cleaned out for better performance.

Old and grumpy,(?), have fairly wide engine & tuning experience, "restoring/resto-mod" on cars & mc, worked as electronic tech. (retired).
GT125R - sold. New (used): 2012-GT250R-efi (sold)+ 2017-GV-125C (sold) - got my old 2018-GT-125R back... 🙂