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

If you're looking to get more displacement and power out of your carbureted 80 cubic inch Harley-Davidson Evolution Big Twin engine, this stroker kit from S&S Cycle is a solid option. It takes your engine from its stock 80 cubic inches up to a beefy 89 cubic inches, bumping the compression ratio to approximately 9.25:1. This means you'll feel a noticeable increase in torque and overall power when you twist the throttle.

This kit includes a dynamically balanced 4-5/8 inch stroke flywheel assembly, complete with S&S heavy-duty connecting rods and mainshafts. To make this work, you'll need special pistons that are ordered separately based on the required oversize for your stock cylinders. S&S offers these pistons to work with stock cylinder heads, S&S Performance Replacement cylinder heads, or S&S Super Stock cylinder heads, giving you flexibility in your build. A key benefit of this kit is that it reuses your stock cylinders, which helps save on costs and maintains the original appearance of your engine. Keep in mind that some minor modifications to the crankcase and cylinders are needed, but these are typically straightforward and can be done with common hand tools.

This stroker kit is designed to fit a wide range of Harley-Davidson Big Twin models from 1984 through 1999, including popular bikes like the Electra Glide Classic, Heritage Softail Classic, and Dyna Super Glide. It's a great way to give your classic Big Twin a significant power boost without completely changing its look.