I don't want to get off topic. To answer post above. I have Carpenter Racing do all my engine work.
https://carpenterracing.com/ He has worked on Triumphs land speed motorcycle that set land speed records. I'm lucky he is here in NJ. He wont tell you exactly what he is doing but he doest use a flow meter or bench meter, he does something else. His porting machine is from France and floats on air and when he ports the intake and valves its truly smooth and not stepped like others do. Atco race track is up the street and they do mostly Hayabusa drag bikes.
He gets 300HP out of the triumph rocket, naturally aspirated, many videos on this. I have a 2019 Triumph Explorer I sent to him as it was new. I told him just do top end work and get more usable HP. He did cams and porting and a tune. I have dyno 30 more rear wheel HP. Close to 190HP at the crank.
My tracker I send out to Hughes Handbuilt to do the engine, just had a 750 kit, ported head, stock cams. 36mm Mickuni carbs and custom exhaust. Its one of my favorite bikes to ride. Its light and fast. He doesn't do this work anymore.
Sorry to talk about other bikes on this form, I love my XS 650. I grew up with not a lot, so now over 60 I'm trying to buy bikes I liked but could never afford.