Any bike will redline just as easily with the stock exhaust, no exhaust, or an aftermarket exhaust. There is no governor either.dude get a full system exhaust and it will redline sooo easy. thats what happened to me. and i think our cbr's have govenors so you can only go a certain speed. i think its hooked up to the speed calibration module. so if you buy a speedo healer or something that re-calibrates the speedo then you will be able to redline in 6th gear.