I was riding with a friend, and his bike seized.. I gave him a ride back to camp on the back of my CR500, I weigh 220 he weighs about 190. Were going up a paved fire road, pretty steep grade. A kid on a CRF250X goes by us and gives us a funny look, Then I see his elbow drop, I pin it with my buddy on the back and go right by him. I went through 3rd...4Th... and into 5Th, I don't think the 500 felt much different with a passenger. Yeah their pretty fast.