I'am just getting into riding so not sure on what i may be doing wrong. It is muddey and a little snow on the ground still but has happen to me before, when i'am out it seemes like the bike is all over the place. The ass end spins out easy. I have it up a gear so it lungs a bit. It is a crf250x. I run the tires at 15 psi what the manusl says, tires are in excellent shape, i think that the bike may sit a little high in the back. Any tips would be gerat. If these things where like riding a snowmobile i would be fast in control but competely different.