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I am having trouble getting the rpms I need on my apex mountain.It had a turbo before but now I'm running it na with the same weights.the weights I'm using are aftermarket 60 grams empty and still only revs to 9500. I don't want a stiffer spring because I need low engagement.are the stock 8fp weights 70 grams empty or full? And is there a better profile weight that lowers rpm at engagement and raises it every where else?
