I did the ear shave, but left the bypass valve and hoses in place. It doesn't help/hurt performance. Technically it's there to burn the unburned fuel in the exhaust for emissions reasons. It makes for some of the pop-pop-pop sound on decel, which I happen to like.hi, i see very detailed explanation thanks, just what i'm looking for..
Can i ask you, what crap i need remove if i want take air filters as well ?(ears shave)
I added another crankcase filter on mine to serve as the air input for the air bypass system.
I left the airbox in the bike for the time being, but now that I have my engine pulled, it's coming out.