Up or down Bogging

When I was riding and started to give it more gas it would go a couple of feet and then act like it was starving for gas started to cut out bog down
 
I thought these motors would rev at high rpm and people said do hold it full throttle to long but i dont have to worry about that
 
i checked my plug,its black and kinda brown in the middle slight trace of oil,but threads are clean. my c-clip is on second from top. should i move the clip up one notch or leave it alone?
 
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