After putting more miles on the bike with the Norman Hyde Bellmouth, I felt an update was in order. I've readjusted the carbs a bit and there is a noticeable performance increase over just removing the snorkel. It's probably more of a change than pulling the snorkel was.
One other thing I didn't mention before - It also makes the engine louder. Not in a bad way, but more like a racing engine way. It's sorta like when I was a kid I took the air cleaner off my Mom's Chevy 327 and ran it on a country road. If you've done that, you know what kind of louder I mean. The engine actually sounds like it is breathing better - definitely more so than just removing the snorkel.
Later this year I plan to put the bike back on the dyno to check tuning. I'll see then what changes I need to make. I'll see if a main jet increase is in order. I just repacked the pipe baffles to tone it down a bit and plan to add another layer. Sounds quite mean now when you open it up.
