Getting rid of the speed limiter will only help you gain power from 4,500 rpms and up in 5th.
Hey bud, I think you are getting a little ahead of yourself on some of your postings. The retarding (dyno proven) happens around 6500-6800 rpm in 5th gear.
By unplugging it, YES, the check engine light will come on after a certain period of time of it being in 5th gear past the 6500rpm point in 5th gear. BY NO MEANS does it "run like crap" like you stated in a earlier post. It simply throws the error code for the speed sensor and reverts back to stock. If that happens you have to go threw the anguish of reaching down and plugging it back in quick roling forward and unplugging it again. Also, 100% of bikes that you unplug it will remove the speed sensor UNTIL the light pops up. Its not a question of some it works, others it doesnt.
If this Blue wire mod works, it seems like the better way to go. HOWEVER, if you end up getting the speed sensor check engine light code again, you are kind a screwed. And I dont think its out of the question for it to possibly happen if you are spending a lot of time at high speed past 6500 rpm in 5th. The reason I say this is several of us now have had the check engine light come on flashing the speed sensor error code and we were running the dynatek ignitions that are suppose to make this sensor obsolete. I didnt even have the sensor installed anymore and had a block of plate and had the ignition and I got the damn light after many many topspeed runs down a runway.
Others have had the light pop up with there's still in but unplugged with ignition. Another had his completely stock with ignition and the damn light came on.
So time will tell if this method 100% works for the long run. Thus far its been iffy with other methods of getting rid of the speed sensor. For us, it was as easy as reinstalling or connecting it back up. Cutting wires is kind a final, unless you have a solder gun out in the woods. This is the latest method, seems like it will work....but based off of all the luck in the past with trying to permanently remove this retarding in 5th you can understand peoples uneasy feelings of cutting ECU wires