trqjnky Posted October 27, 2006 Share Posted October 27, 2006 On my 2004 yz250 my buddies took the crank out and drilled holes in the counter weights on their C&C machine that create a supercharging effect. the factory yamaha riders have been using it for years. put it on the dyno again today after drilling the crank, and picked up a whopping 11 h.p. on the low end and 5 h.p. on the high end. i will post up dyno sheets when i get them for people to see the differances. Quote Link to comment Share on other sites More sharing options...
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