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I have a ZR 440 that is currently engaging at 5500rpm and holding 8500 rpm all the way thru. I would like to keep the engagement rpm but raise the operating rpm to between 9000 and 9200 to perform along with a new set of twin pipes. I have three sets of weights which I can work on the current ones are 46g I have 45g and 47g How much weight do I need to get rid of in theory to gain 700 rpm and where is the best spot heel or toe or complete surface?