I never had this problem until the other day. I was out riding and came to a stop and it stalled out on me. I started it back up and it wouldn't rev correctly. I had the throttle pinned and it was making a weird bogging noise. Then i put it in gear and it was reving properly. I thought it was fine but it did it again the next day and again when i put it in gear it ran fine. If anybody has anything that could help id appreciate it.