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  4. S&S 4 1/4" BIG BORE KITS FOR MILWAUKEE EIGHT

S&S 4 1/4" BIG BORE KITS FOR MILWAUKEE EIGHT

4 products

Category dedicated to S&S 4.25-inch (69 ci) big bore kits designed specifically for Harley-Davidson Milwaukee Eight engines. These cylinder and piston sets increase engine capacity, improving torque and throttle response. Includes cylinders, pistons, piston rings, and necessary gaskets for installation.

  • Kit de cilindros S&S Big Bore 4 1/4 pulgadas para motor Harley Milwaukee Eight View details
    S&S CYCLE

    S&S 4 1/4″ Big bore kits for Milwaukee Eight

    Version: Kit 128CI Big Bore para usar en 114CI y 117CI Milwaukee Eight, negro rugoso

    These 4 1/4" (107.95mm) bore kits are easy to install as no crankcase machining is required. The kits include…

    Ref.
    AK-4724-6380
    Manufacturer Ref.
    782779
    Make
    S&S CYCLE
    In stock
    1.824,23€ IVA inc.
  • Kit de cilindros S&S Big Bore 4 1/4 pulgadas para motor Milwaukee Eight View details
    S&S CYCLE

    S&S 4 1/4″ Big bore kits for Milwaukee Eight

    Version: Kit 128CI Big Bore para usar en 114CI y 117CI Milwaukee Eight, negro rugoso con aletas resaltadas

    These 4 1/4" (107.95mm) bore kits are easy to install as no crankcase machining is required. The kits include…

    Ref.
    AK-4791-8759
    Manufacturer Ref.
    782780
    Make
    S&S CYCLE
    In stock
    1.824,23€ IVA inc.
  • Kit de cilindros S&S Big Bore 4 1/4 pulgadas para motor Milwaukee Eight View details
    S&S CYCLE

    S&S 4 1/4″ Big bore kits for Milwaukee Eight

    Version: Kit 124CI Big Bore para usar en 107CI Milwaukee Eight, negro Rugoso

    These 4 1/4" (107.95mm) bore kits are easy to install as no crankcase machining is required. The kits include…

    Ref.
    AK-8006-1467
    Manufacturer Ref.
    782777
    Make
    S&S CYCLE
    In stock
    1.824,23€ IVA inc.
  • Kit de cilindros big bore S&S de 4 1/4 pulgadas para motor Milwaukee Eight View details
    S&S CYCLE

    S&S 4 1/4″ Big bore kits for Milwaukee Eight

    Version: Kit 124CI Big Bore para usar en 107CI Milwaukee Eight, negro rugoso con aletas resaltadas

    These 4 1/4" (107.95mm) bore kits are easy to install as no crankcase machining is required. The kits include…

    Ref.
    AK-1646-7696
    Manufacturer Ref.
    782778
    Make
    S&S CYCLE
    Out of stock
    1.824,23€ IVA inc.

About this category

Compatible with Touring, Softail, Dyna, and Sportster families fitted with the Milwaukee Eight engine, from its introduction in 2017. Ideal for those seeking a significant power increase while maintaining the engine’s original reliability. Typical references such as S&S 474C or 585G within this range. Essential spares for customisation and performance enhancement projects on modern American motorcycles.

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