A local dealer is going to let some of us use a YZ450FX for a day. A bunch of us are interested in buying one. We are going to compare it to our stable of bikes including my 2012 WR450F, my 2015 YZ250FX, a 2015 YZ450F and possibly a stock 2015 WR450F. We'll do a shootout of sorts, on the trails we usually ride. Our bikes have all been tweaked with gearing, springs, tires and sometimes maps. We'll have the 450FX for 24 hours, so we have a bit of time to play with it. I'm wondering what we should do to the loaner YZ450FX in order to optimize it for comparison with our bikes ? - respring the shock ? We all weigh over 200 pounds. - probably can't touch the forks, other than clickers - program it for softer low end power ? - change tires ? We want to get the best bike to bike comparison we can in the 24 hours we have the FX. Anything else we should consider ? I know a guy with a KTM 350 XCF. I'm hoping I can convince him to join the group, but it isn't looking likely.