S&S Cycle 84-99 BT 89in Stock Bore Stroker Kit

S&S 89" stock bore stroker kit upgrades carbureted 80" HD 80 Evolution Big Twin engines to 89" displacement at approximately 9.25:1 compression

• Includes a dynamically balanced 4-5/8" stroke flywheel assembly complete with S&S heavy duty connecting rods and mainshafts
• Minor crankcase and cylinder modifications are required, that can easily be done with hand tools
• Pistons are available for stock or S&S Performance Replacement cylinder heads or for S&S Super Stock cylinder heads
• Stock bore stroker kits reuse the stock cylinders, saving cost and retaining appearance of the engine
• This kit requires special pistons which must be ordered separately depending on the oversize required for the stock cylinders

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