What can I expect from the stock air box mod

I finally got to check out the mod. 50 miles tonight. I want to be as accurate as possible for future readers that might consider this mod. My bike is stock except I am running 15/35 I added a tooth to the rear because there just wasn’t enough torque to get going with stock sprockets and I couldn’t pull 3rd gear past 8.25k, 4th was even worse and pulled to 7.5k max. I do have the 12oclock speedo healer installed and dialed in. I rode the same roads I’ve been riding for years and know what to expect from the setup before this mod. First let me comment on the noise. I hate induction noise and removed a chimera intake after a 5 minute ride because it was too loud. This was a pleasant surprise. Yes it is louder than stock but if you didn’t know what stock sounds like you wouldn’t know it was louder. I could hear it over my stock exhaust but the wind noise in my helmet was louder. About as loud as a cat purring vs not. I have no problem keeping this mod on for good. As mentioned earlier I am 1 tooth shorter than stock for a tiny bit more torque Below 5k. With this mod I would say I lost about half of that gain. I can live with it but may go up to 36 to get it back. I was able to pull 3rd gear to 9k @56 mph. That’s a little more than pre mod. Fourth was still below 8k but there was no loss of performance. My bike reliably gets me to 53 mph sitting straight up. If I need 55 I have to tuck. After the mod I was able to go 54 mph sitting up. That’s a huge improvement when I only hope to make small gains. Top speed in a tuck was 63. I haven’t tuned the ecu for this ride. I’m going to install a Tb cam next and get a stage 2 ecu tune. The cam will lose a bit of low end torque but wake up around 6k. By adding another tooth in the back i hope to compensate for the cam profile and I think I may be able to hit the limiter in 3rd and pull 4th higher. I don’t expect any more noise from the tune so this may be the 55 mph with staying power I’m looking for. Parts are on order.

Okay. David was helpful with the hanging idle issue. I had to adjust the plastic air/idle? Screw. I started with a half turn clockwise and it lowered my idle to 1k. The hanging idle disappeared but the idle was too low. I ended up going back clockwise a quarter turn and the idle settled in at 1400. I have done 2, 20 mile rides and it doesn’t hang up so that’s behind me. What I can say is I’ve lost some more torque in the lower rpm’s and I still can’t pull 4th past 8k. I can hit and hold 55 on a flat road without tucking so there is improvement. I’m going to change the rear sprocket from a 35 to a 36. That will help with the low end torque and also help 4th gear pull past 8k. I don’t think it will make the bike faster but it should feel better. I may ride it a few more times before the swap just to get a better feel for it first