Overview

S&S Cycle 97 in. Big Bore Kits

S&S Cycle 97 in. big bore kits will increase the displacement of 88 in. engines to 97 in., are easy to install, and require no machining or re-balancing. Using an 11-fin design, these pre-finished cylinders closely resemble the OEM shape and are ready to install. Order an S&S Cycle 97 in. big bore kit—and take your stock engine case as big as it'll go!

Features of the S&S Cycle 97 in. big bore kits:

* The 97 in. big bore kits for 88 in. motors yield excellent results with stock cylinder heads
* Feature the same silver or black wrinkle powder-coat as stock, so they match the stock finish of the engine
* Specifications: 3.927 in. bore, 4 in. stroke, 97 in. displacement, and 9.7:1 compression ratio with stock heads (9.3:1 compression ratio with S&S 89cc heads or 10.7:1 with S&S 79cc heads)
* Feature the largest bore (3.927 in.) that can safely be used in a cylinder with stock spigot diameter
* Included S&S cylinders feature a much stronger cast iron liner to stand up to the added power
* Easy installation: no need to bore or split existing cases, just swap the cylinders
*Kit includes cylinders, pistons, rings and gaskets (head, base and exhaust)
* For best performance, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning is required

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