my next investments in order of priority will be; kfx450 front shocks, anti-vibe handlebar mounts, Fly raised handlebars, hand guards, and possibly a tusk axle. the quad is trying to roll in the first part of corners on the track, i still have stock tires but its trying to roll hard to the front left and right when i turn. I think +2 in the rear may help but im trying other things because i really dont wanna get too wide! I have taken a few steps towards it and also riden other bikes to see what works. jetting helped, i noticed once you get the tires spinning and the back end sideways it takes some of the weight off the front and makes the bike roll less, higher front shock preload, higher tire pressure. ill install the kfx450 shocks and see how it works. so far that has been my only problem with the bikes performance. I have ridden the crap out of other 400s and once i got my stock bike i felt handicapped until i made some adjustments lol.