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Discussion Starter #1
I just got a 99 KTM300mxc my buddy that had it before me had rebuilt the top end and put all new gaskets it's a nice looking bike ,but when the powerband kicks in it;s not that clean and crisp it ,almost like it breaks up slightly the powerband is not kicking in like it should this bike should pull way harder,I'm pretty sure the reeds are new ,it starst first kick ,carb is also clean,could anybody help with this
 

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I don't mean to offer such a simple suggetion, but I fought this problem on my Yamaha after a top-end rebuild. Part of the rebuild was to install a new spark pulg. For the longest time, I was getting plugs correctly gapped right out of the box. In fact, I quit checking them. And that, was the problem.

The new plug was gapped at .035 instead of.024. A little correction on the gap, and the bike was back in the game. It was that simple, and I had also been through the carb at least twice.
 
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