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S&S Cycle
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S&S Cycle M8 128in. Big Bore Kit - 4.250 Bore, 4.5 Stroke, Highlighted Fins - Black - 910-0684

910-0684

Description

Available for both 107 and 114 M8 models.
Available in both highlighted and non highlighted versions
Wrinkle black finish
Non-highlighted fins
Bolt-on kit. Largest bore possible without machining required
includes gaskets and hardware required for installation
4.250in. bore
Forged pistons
10.5:1 compression ratio
Made in USA

Product Series

Application List

YearsMakeModelApplicationNotes
2018 - 2023Harley DavidsonFLFBS Fat Boy 114
2021 - 2021Harley DavidsonFLH Electra Glide Revival
2018 - 2023Harley DavidsonFLHCS Heritage Classic 114
2023 - 2023Harley DavidsonFLHFB Electra Glide Highway King
2019 - 2023Harley DavidsonFLHRXS Road King Special
2019 - 2023Harley DavidsonFLHTCUTG Tri Glide Ultra
2022 - 2022Harley DavidsonFLHTCUTG Tri Glide Ultra G.I.
2019 - 2023Harley DavidsonFLHTK Ultra Limited
2019 - 2019Harley DavidsonFLHTKL Ultra Limited Low
2019 - 2023Harley DavidsonFLHXS Street Glide Special
2022 - 2023Harley DavidsonFLHXST Street Glide ST
2020 - 2023Harley DavidsonFLTRK Road Glide Limited
2019 - 2019Harley DavidsonFLTRU Road Glide Ultra
2019 - 2023Harley DavidsonFLTRXS Road Glide Special
2022 - 2023Harley DavidsonFLTRXST Road Glide ST
2021 - 2023Harley DavidsonFXBBS Street Bob 114
2023 - 2023Harley DavidsonFXBR Breakout 117
2018 - 2020Harley DavidsonFXBRS Breakout 114
2019 - 2020Harley DavidsonFXDRS FXDR 114
2018 - 2023Harley DavidsonFXFBS Fat Bob 114
2020 - 2021Harley DavidsonFXLRS Low Rider S 114
2022 - 2023Harley DavidsonFXLRS Low Rider S 117
2022 - 2023Harley DavidsonFXLRST Low Rider ST 117
2022 - 2022Harley DavidsonFXRST Low Rider El Diablo 117

Shipping Information

  • Item Requires Shipping
  • 5.0 lbs.
  • W6.0000” x H10.0000” x L4.0000”
  • Free Ground Shipping (1 - 5 Days)