I took 2 front rollers out of my daughters kfx 80. i ended up ordering new rear clutches. Is it worth the time to shave them down to 180g with a stock motor or would it still help some? The only things done to it is, A front performance clutch spacer, uni filter, Boyesen reeds and the oil injection pump/gear removed for pre mix gas. Was hoping to put it back together tomorrow at the latest. Please give me your advice....