S&S Cycle 55-64 BT 84in Stock Bore Stroker Kit

Starting with a dynamically balanced 4-1/2 inch stroke flywheel assembly, this S&S Cycle stroker kit is a solid way to economically increase the displacement of your Big Twin engine. Designed to upgrade 74 cubic inch Panhead engines to a full 84 cubic inches, this kit offers a significant bump in power and torque. The compression ratio you end up with depends on the specific pistons you choose, allowing you to tailor the build to your needs, with options around 8.4:1 or 7.3:1 compression.

This kit includes S&S heavy-duty connecting rods and mainshafts, built to handle the increased stresses of a larger displacement engine. It's important to note that while this kit is designed to be an economical upgrade, it does require some modifications to your crankcase and cylinders to fit properly. The use of special pistons is also necessary to achieve the desired compression and fitment with the stroker components.

If you're looking to get more performance out of your Big Twin without a complete engine overhaul, this stroker kit from S&S Cycle is a well-regarded option. It's a substantial upgrade that changes the character of the engine, providing that extra grunt you're looking for. Remember to consult the manufacturer's instructions for the specific crankcase and cylinder modifications required, as well as for piston selection guidance.