Leelee, I had shit jetting for 6 months - until I got my head cut.
Lowered squish (1.35mm) & reshaped the bowl to keep comp at 13.5/1.
Now, 42p/175m, NEDW #2, a/s 1.5, Motul 710 in 98RON. Tech s/t & rocks, 17c today.
Bike is smooth, quiet & super-tractable. More low/mid power. Same bonkers...