Potentially, the cluster could have been replaced with a used one from a low-mileage 'gade, but I'm more (rightfully so) interested in engine hours, than miles, either way. Some owners idle their bikes for extended periods of time, or just kinda putt around on 'em. My '07 gade had 170 hrs on it, at ~7yrs old, rumor has it the old man just used it to check his fence lines, so lots of slow speed operation, could be the same for yours.
There's a video on youtube regarding a PS install on an '07 gade, I don't know of anything that says "it can't be done"
IT DEPENDS HOW MANY HRS RECOMENDED BEFORE REBUILD AND WHERE IT WAS USED MUD HIGH MT FLAT FARMLAND WOODS AND SWAMP THOSE MOTORS ARE BULLET PROOF RUN HOT BUT HOLY SHIT DO THEY PULL MAJOR TORQUE LIKE NO OTHER THEY HAVE SMOOTH POWER THAT WILL GET U THERE