<blockquote><font size=1>In reply to:</font><hr>
The jets are the best with the akrapovic system but you will LOOSE SOO much low end if you put an airbox on it.
If it gains power way up high and loses low, it really isn't losing it low it actually just moves the torque up farther in the curve. It may take an extra 1k rpms to build the torque than before the mod. You can fix that with a timing advance kit. It's like degreeing a cam on a truck. When you use a horsepower (mid to high range) on a truck you push everything up in the curve which will hurt you if you tow with it. You can degree the cam and bring everything lower in the curve so that the torque will com in sooner and the midrange will start to push sooner. But, I agree with your suggestion to use a kit that will most likely not have this problem because he will have one of two problems. Without the advance kit he will lose throttle response off the line and the power will come on like a freight train in the mid-range which kind of kills you in any situation where you want/need straight line acceleration or with the advance kit the freight train is moved down in the curve and the throttle response is greatly improved but the power will peak sooner in the curve. It really all depends on what you want the bike to do. Do you like that top speed or do you like the bike to pull hard down low. Most of us don't ride our bikes at 170mph everywhere we go anyway, but owning R1's I'm sure most of us can agree that the chassis doesn't need alot more low end, which the advance kit will do, because it may wheelie uncontrollably if you try to holeshot it.