Hello, I read this forum all the time and wonder if I could get an answer to a question I have. I have a 2014 YZ450F and I put a FMF Factory 4.1 slip on exhaust on it. I did a 2 hour woods race this weekend and it stalled on me 3 times during the race. I sat their kicking it for about 10 minutes. Sometimes when I was racing down the trail it would make a crackle/pop noise. I think it might have something to do with the mapping, but not sure. The stalling was not from the clutch and locking up the brakes, it just would cut out sometimes. Then it wouldn't start and I would have to kick it so many times. If anyone has any answer that would help, thanks. The mapping I have right now is just all 0s, just the stock mapping.