V124 Long Block Engine — 124" displacement, 4-1/8" bore, 4-5/8" stroke, 10.8:1 compression

S&S CYCLE V124 Long Block Engine — 124" displacement, 4-1/8" bore, 4-5/8" stroke, 10.8:1 compression – 84-86 Big Twin, 84-90, 93-95 Touring, 85-86, 89, 98-99 Softail, 91, 94 Dyna, 85-94 FXR, 99 CVO

S&S CYCLE
0901-0259
310-1160

Complete V124 long block for Evolution Big Twin and compatible custom chassis; includes machined heads, forged internals, three-piece flywheel, and chrome covers. Requires performance ignition and carb re-jetting.

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V124 long block engineered for '84-'99 Evolution Big Twin or '70-'99 custom chassis with alternator-style primary.

Specially machined cylinder heads allow use of stock-length manifold and your existing carburetor (re-jetting required).

Designed to bolt into stock or aftermarket EFI, carburetor, or air cleaner setups; crank and case are machined for a crank position sensor.

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

Made in the USA; includes chrome-plated engine and timing covers and will require a performance ignition and performance carburetor for best results. 🛠️🏍️

: 0901-0259
In Stock

Data sheet

Type
Long Block
Units
Each
Color/Finish
Chrome, Natural
Brand
S&S CYCLE
Piston Material
Forged
Bore Size
4-1/8"
Displacement
124"
Stroke Length
4-5/8"
Compression Ratio
10.8:1
Harley Family
CVO
Dyna
FXR
Softail
Touring
Vintage Big Twin

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Electra Glide Standard Big Twin 1984
Harley Davidson Electra Glide Standard Big Twin 1985
Harley Davidson Electra Glide Sport Touring 1987
Harley Davidson Electra Glide Sport Touring 1988
Harley Davidson Electra Glide Sport Touring 1989
Harley Davidson Electra Glide Sport Touring 1990
Harley Davidson Electra Glide Sport Touring 1994
Harley Davidson Electra Glide Touring 1984
Harley Davidson Electra Glide Touring 1986
Harley Davidson Electra Glide Touring 1987
Harley Davidson Electra Glide Touring 1988
Harley Davidson Electra Glide Standard Touring 1995
Harley Davidson Electra Glide Classic Touring 1984
Harley Davidson Electra Glide Classic Touring 1985
Harley Davidson Electra Glide Classic Touring 1986
Harley Davidson Electra Glide Classic Touring 1987
Harley Davidson Electra Glide Classic Touring 1988
Harley Davidson Electra Glide Classic Touring 1989
Harley Davidson Electra Glide Classic Touring 1990
Harley Davidson Electra Glide Ultra Classic Touring 1989
Harley Davidson Electra Glide Classic Touring 1984
Harley Davidson Electra Glide Special Touring 1984
Harley Davidson Electra Glide Special Touring 1985
Harley Davidson Heritage Softail Softail 1986
Harley Davidson Tour Glide Touring 1984
Harley Davidson Tour Glide Classic Touring 1984
Harley Davidson Tour Glide Classic Touring 1985
Harley Davidson Tour Glide Classic Touring 1986
Harley Davidson Tour Glide Classic Touring 1987
Harley Davidson Tour Glide Classic Touring 1988
Harley Davidson Tour Glide Classic Touring 1989
Harley Davidson Tour Glide Classic Touring 1990
Harley Davidson Tour Glide Ultra Classic Touring 1989
Harley Davidson Tour Glide Ultra Classic Touring 1990
Harley Davidson Tour Glide Ultra Classic Touring 1993
Harley Davidson Tour Glide Ultra Classic Touring 1994
Harley Davidson Dyna Glide Sturgis Dyna 1991
Harley Davidson Dyna Super Glide Convertible Dyna 1994
Harley Davidson Fat Bob Big Twin 1985
Harley Davidson Fat Bob Big Twin 1986
Harley Davidson Low Rider Custom FXR 1987
Harley Davidson Low Rider Custom FXR 1988
Harley Davidson Low Rider Custom FXR 1989
Harley Davidson Low Rider Custom FXR 1990
Harley Davidson Low Rider Custom FXR 1991
Harley Davidson Low Rider Custom FXR 1992
Harley Davidson Low Rider Custom FXR 1993
Harley Davidson Low Rider Custom FXR 1994
Harley Davidson Super Glide FXR 1986
Harley Davidson Super Glide FXR 1987
Harley Davidson Super Glide FXR 1988
Harley Davidson Super Glide FXR 1989
Harley Davidson Super Glide FXR 1990
Harley Davidson Super Glide FXR 1991
Harley Davidson Super Glide FXR 1994
Harley Davidson Super Glide Screamin Eagle CVO 1999
Harley Davidson Super Glide Screamin Eagle CVO 1999
Harley Davidson Low Glide Custom FXR 1985
Harley Davidson Low Glide Custom FXR 1986
Harley Davidson Low Glide Custom FXR 1987
Harley Davidson Disc Glide FXR 1986
Harley Davidson Disc Glide Big Twin 1985
Harley Davidson Low Glide FXR 1985
Harley Davidson Low Rider FXR 1986
Harley Davidson Low Rider FXR 1987
Harley Davidson Low Rider FXR 1988
Harley Davidson Low Rider FXR 1989
Harley Davidson Low Rider FXR 1990
Harley Davidson Low Rider FXR 1991
Harley Davidson Low Rider FXR 1992
Harley Davidson Low Rider Convertible FXR 1989
Harley Davidson Low Rider Convertible FXR 1990
Harley Davidson Low Rider Convertible FXR 1991
Harley Davidson Low Rider Convertible FXR 1992
Harley Davidson Low Rider Convertible FXR 1993
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1986
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1987
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1988
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1989
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1990
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1991
Harley Davidson Low Rider Sport Edition (Fxrsl) FXR 1992
Harley Davidson Sport Glide FXR 1985
Harley Davidson Sport Glide FXR 1986
Harley Davidson Sport Glide FXR 1987
Harley Davidson Sport Glide FXR 1988
Harley Davidson Sport Glide FXR 1989
Harley Davidson Sport Glide FXR 1990
Harley Davidson Sport Glide FXR 1991
Harley Davidson Sport Glide FXR 1992
Harley Davidson Low Rider Big Twin 1985
Harley Davidson Softail Softail 1985
Harley Davidson Softail Softail 1986
Harley Davidson Softail Night Train Softail 1998
Harley Davidson Softail Custom Softail 1986
Harley Davidson Softail Custom Softail 1999
Harley Davidson Softail Springer Softail 1989
Harley Davidson Wide Glide Big Twin 1985
Harley Davidson Wide Glide Big Twin 1986