S&S CYCLE V124 Long Block Engine — 124 cu in, 4-1/8" bore, 4-5/8" stroke – 84-86 Big Twin, 84-98 Touring, 85-99 Softail, 91-99 Dyna, 85-94 FXR, 99 CVO

The S&S V124 Long Block Engine is a turnkey long-block designed for '84-'99 Evolution big twins or '70-'99 custom chassis with alternator-style primary.

Includes S&S cylinder heads, S&S valve springs, forged rocker arms, 640 cam, three-piece flywheel assembly, forged pistons, electric compression releases, and a high-volume high-pressure oil pump.

Crank and case are machined for a crank position sensor, and the specially machined cylinder heads allow use of a stock-length manifold so you can reuse your existing carburetor (re-jetting required).

Engine is designed to bolt into stock or aftermarket EFI, carburetor, or air cleaner setups and is made in the USA. It will require a performance ignition and a performance carburetor for optimal results. ⚙️