I'm planning on replacing the big ass stock speedo on my 2006 Ninja 650R with something a bit smaller, and these bobber/cruiser speedos look like they fit what I'm wanting perfectly. My only worry is, will it work? Theres a big wiring harness connecting my stock speedo, and this is a "mechanically driven" speedo. Is it just too much of a pain in the ass to use one of these speedos or is it really simple and I'm just a dumbass? Can anyone let me know what replacing it with this would include doing?