Installed Tune #2 with my Arrow 2-1, the Breathe Airbox cover, and the O2 removal kit.

Installation was simple enough. On my Scrambler I had to lift the gas tank as one O2 sensor was plugged right underneath it. No need to disconnect fuel hose, just the breather.

Note that having a 0.60v TPS is crucial! Mine was 0.63v when I installed first round and led to very rough running. As soon as I set the TPS correctly, and reinstalled the tune, the bike runs like a dream!

I haven’t had a bike before where I can coast at 10kph through a corner in the city without having to ride the clutch. Low end response is incredibly smooth, and the exhaust note has change slightly (even better than before). Popping on decel appears to be totally gone now as well - no more waking up the neighbours!

Would highly recommend this to anyone running a 2-1 pipe and looking to smooth out their throttle at low rpm.