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Re: counter weights needed? but not all engines are counter weighted and yes i know its to counter weight rods and pistons but what experience have you guys found/had? smoother, revs higher?

Ok if building a good street/performance motor and have a respectively light flywheel do you need counter weights? most people add weights to smooth out vibrations caused by weight of stock flywheel on crank/flex and main bearing stress, but if weight is greatly reduced from flywheel you gain...