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Power problem question

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I'll start off by saying that this is the first four stroke I've ever rode and it's been 8 years since I've been on the track, so cut me a little slack as I'm learning the curves of the four stroke. I just bought an 09 rmz450 and been riding at a local indoor track. This was my third time out and I decided to try and clear the tabletop. I was watching the lines of the a/b riders and was listening to how much throttle they were using. To my surprise they weren't pinning it out of the corner. I started hitting it harder and harder and noticed that in order for me to clear it, I had to have it pinned out of the corner. I fir \st thought that him using a sprocket with 1 less tooth might make a difference, but It's such a tight corner to the face that I can't see it being the problem. I was just wondering where I should start looking for the problem. It has a yosh slip on if that makes a difference.

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What gear are you in? If you are indoors and you really have it pinned in second or third, you'll probably go through the roof

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What gear are you in? If you are indoors and you really have it pinned in second or third, you'll probably go through the roof

I was in 2nd gear. My theory is one of two things or both. I am riding it too much like a 2 stroke or it's my sprocket. The guy at the track also said he would land in the corner if it was pinned, but I promise it was pinned. I didn't have to pin in on the triple though. None of this makes sense and it's racking my brain. I don't know enough about four strokes yet to make my own assessment so I'll probably have the motor looked at by a mechanic this week.

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