Bolt-In Sidewinder® 4" Big Bore Kits

  • Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frame
  • Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer
  • 88" engines are boosted to 100"
  • 96" and 103" engines are boosted 110"
  • 10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams
  • Complete kit includes cylinders, forged pistons, rings, piston pins, clips and gaskets
  • Not for use with S&S 79cc heads.


  • Not recommended for trike models.
    € 2.188,70 incl. VAT

    Out of stock

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    We prepare your vehicle for the road
    Large assortment
    Specialized in recreational vehicles
    Bolt-In Sidewinder® 4" Big Bore Kits

  • Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frame
  • Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer
  • 88" engines are boosted to 100"
  • 96" and 103" engines are boosted 110"
  • 10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams
  • Complete kit includes cylinders, forged pistons, rings, piston pins, clips and gaskets
  • Not for use with S&S 79cc heads.


  • Not recommended for trike models.
    Article number
    09310739:910-0642
    Bore Size
    4,000"
    Bore Size Imperial
    4.000"
    Color/Finish
    Silver
    Compression Ratio
    10,5:1
    Compression Ratio Imperial
    10.5:1
    Displacement
    100"
    Model
    Sidewinder
    Product Name
    Cylinder and Piston Kit
    Research Value
    Finalized
    Riding Style
    Street
    Stroke Length
    4"
    Stroke Length Imperial
    4"
    Type
    Big Bore
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    Kit

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    Why QFF?

    Specializing in recreational vehicles

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    Specializing in recreational vehicles

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