By hi’s and low’s I mean on the fuel map table in the Woolrich software (that I bought and can flash ECU’s as part of my business) . I used my Zeigtronics tuning hardware to shoot for “best AFR” . It didn’t cost me anymore to do. The AFR was real close to begin with but why not make it perfect? Especially when I already had the means. Flashing off the fuel cut off, turning off the EGO , lowering the cooling fan temp and turning off the EVAP system really makes the RS a real sweet bike. I bought all the software thousands of miles AFTER the de-cat. So I am talking from experience. If you de-cat it’s not going to run in any negative way to stock. Watching that guys video is not relevant since we started out this thread by talking about using the stock muffler. If Kawasaki tuned this bike with a specific “back pressure” tune they would have used an exhaust butterfly valve to control it like on the Zx series bikes. But they didn’t. So their back pressure tune is NOT critical. The tuning I do is by the seat of the pants, and not a Dyno. Dyno’s have there place when you are chasing after the last bit of HP or you want bragging rights. Honestly on the RS I think most of just care about the ride and not the bragging rights to a graph that has a line higher than anyone else’s. That’s why I sell an ECU flash that quite honestly is all you need to make the RS one sweet ride for 250$.
There is a intake volume that controlled by the secondary butterflies, that is tuned in to match the cam. You definitely can change the feel and drivability if you change that. I do NOT change that in my flash. Maybe later I will play with it (cause I can) but I like the RS throttle response just the way it was designed. If you turn THAT off you will definitely feel a drivability issue then.