Seller notes

237cc Big Bore Kit add 20% to engine displacement! Added HP and Torque. This kit maintains the standard compression ratio, and will not require increased fuel quality. Kit includes all the parts needed to supply a ready-to-run kit (piston, rings, gaskets, larger cylinder sleeve). A cylinder core charge of $50 is included in the selling price, and can be refunded upon receipt of an undamaged (no broken fins, heavy corrosion, etc). Additionally, if you’d like to send your cylinder in to be used,...

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