Guest Bob Mac Posted January 13, 2012 Report Share Posted January 13, 2012 UNDERDRIVE CRANK PULLEY This project took 3 hours to do. It should give me about 10 more HPand looks like 4 miles per gallon. I see no down side yet. http://www.cjponypar...05-2009/p/UP43/ Thanks Bob Mac Link to comment Share on other sites More sharing options...
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