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Having a powervalve gives you much more low end power, this smoothes the powerband.
ESR big bore cylinder kits are the latest in a long line of products built to out-perform and out-last the competition. Al kits are available in our “standard” porting options that have made our name synonymous with performance: “7” port (mx/woods), “9” port (“all-around”), and “11” port (hill shooter/drag racer). ESR cylinder kits come complete with fully ported cylinder, billet head body and dome set, new piston set, new exhaust flanges, new cr style reed cages, intake manifolds for 33-40mm carbs, new hardware and all necessary gaskets. esr cylinder kits can also be set up for
our +4mm stroker crank, call for details.
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