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I recently aquired a HSR 42 carb and am trying to decide if I should install it or not. I've read some places that a properly tuned CV carb can make almost the same numbers as a HSR carb. I've read others that the Mikuni makes a huge difference.

I am running an SE aircleaner and will either go to slip-ons or a full exhaust. Also how hard is it to tune the Mikuni?