nice ride dude,what year is your motor and what year is your 250 frame.?.and is that a 110 x 19 on your rear,i just recently bought a 2010 monster kx500afx yes i said x road registered one from them service mob and and got them to put a 18" rear rim coupled to a 140 and still cant stop her from washing out the back end when i crack the throttle,thinking bout putting on a 150/160..?..can you get a 150/160 x 18"..hmmm room for thought..