I just purchased a WR250F after years of riding a 90's YZ250. Read all about uncorking it, but not sure what applies to what years. Seems alot of the info and articles refers to the earlier years of the WR250F's. The owner before me did these mods:GYT-R air cleaner(looks like the K and M),GYT-R AIS removal kit, GYT-R Exhaust insert, Boysen Quick Shot, re-jetting. Nothing done w/ the airbox, grey wire, or exhaust(other than the larger diameter insert. Can't tell if this is all I should deal with on this bike as I have nothing to compare it's power too. Need advice on deciding to go with the further free/or$$ mods.