S&S, 107" to 124" big bore conversion cylinder and piston kit

Complete direct bolt-on kit for a 2025 cc engine. Compatible with original 107" engines with a 4.375" stroke. Converts the 107" engine to 124". Includes black cylinders with wrinkle finish and highlighted fins, and a 4.250" bore forged piston and ring kit, with a 1.143" deck height and 4.3 cc (dish) chamber volume, for an 11:1 compression ratio with the original cylinder head combustion chamber. Includes all head and base gaskets, as well as the necessary hardware. Offers a massive displacement increase with direct bolt-on ease, with no need to machine the crankcase, work the cylinder head or rebalance the flywheel assembly.
Note: Compatible with OEM cylinder head bolts, but S&S recommends the S&S 576972 cylinder head bolt kit, 14% stronger than the originals, for all large-displacement applications.


Specifications


Brand
S&S


Application
17-24 107" M8 (NU)


Sales unit
Kit


Colour
Black


Material
Aluminium


Finish
Wrinkle


Packaging weight
13.425 kg


HS Code
84099100


Motorcycle family
SOFTAIL, TOURING, TRIKE


Original name
S&S, 107" to 124" big bore conversion cylinder & piston kit