When Iam racing and I hit a jump(like a step up)and there is a sharp turn after the jump.........I hit my back brakes to slow down for the turn and it never fails........my bike usually stalls and dies. Say for instances like this weekend.....I was in third place with the other two guys right on my front tire. We were heading up a hill and at the top you could either go around the turn with a burm in it which was on the right side of the turn or you could go over a hump which was on the left side of the turn(you had the choice)The guy in first went to the right and took the sweep(berm)and the guy in second laid to the left and decided to go over the hump and I did the same.The guy in second in front of me was going just a tad slower than me when aproaching the hump.I on the other hand had a little bit more speed and had to brake to avoid running into his back tire so when I braked my bike stalled and had to start it back. I lost five postions but got three of them back before the last lap. I also have noticed when I hit a jump I have to goose it a couple of times because it sounds like it could die if I didnt.