If you have the stock jetting it can be the problem. My 2011 300 six days hit like a 125 and had dead spots all over. Now I run a n3eh needle (3rd clip) 165 main and 38 pilot at 1000 to 2500 foot. I drop one clip for up to 6500 ft. With jet change I have ran this needle to 13,000ft. This set up makes lots of Smooth even power.l feel if the power is smooth and even you can't have too much.
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