136" Big Bore Kit

136" Big Bore Kit

The 136" displacement is a combination of 4.320" big bore cylinders and an S&S 4-5/8" (4.625") stroker flywheel (sold separately)

Maintains original factory engine height to ensure stock frame and exhaust clearance

Retains original engine serial numbers

Direct bolt-on for 114" and 117" with stock flywheel to make 132" high-compression displacement, to get 136" displacement will require an upgrade to the S&S 4.625" stroker flywheel.

107" engine requires S&S 4.625" stroker flywheel assembly in order to achieve 136" displacement.

Does not fit models equipped with Variable Valve Timing (VVT).

Not compatible with H-D 4-5/8" stroke flywheel.