I've found more than one package on a grocery shelf. The worst was watching a lady pull a package of ground turkey out , open the plastic and feed some to her dog. Naturally she left the package behind.
When I tangled with a Honda and their clones , the main jet was screwed into the base of the emulsion tube housing. This is a completely different setup. I opened up the idle and main jets and it's much better now. HF Micro drills to the rescue.
Would I be correct in saying...
Because of that, the 454 can tolerate
a larger intake port than the 440?
Short rods (lower R/S ratio) require larger ports and vice versa.
Shorter ,sharper intake pulses with the 454.