The WISECO Piston Kit features a 4.135-inch bore and is designed for 121 CI, 114-inch, and 117-inch M8 applications. Its ArmorX™ piston coating provides protection in extreme conditions and helps reduce wear, while the ArmorFit™ skirt coating auto-adjusts to the cylinder wall to eliminate the need to measure clearance. The kit is designed to support smooth, quiet, and trouble-free operation.
A dome design improves flame travel to help maximize air/fuel burn efficiency. The 11:1 high-compression ratio is intended to provide added power. Additional features include a Superfinish piston pin to reduce friction and improve scuff resistance, enhanced pin oiling for improved lubrication, augmented ring land details for improved ring seal and function, and dedicated rings for precise fit, compression, and oil control.
The kit includes two pistons, rings, piston pins, and circlips. It is made in the USA and fits OEM and Screamin’ Eagle cylinder heads. Distributor part number: 09031680. Manufacturer part number: K2806. Fitment includes 2018 Harley-Davidson FXBRS Breakout 114; 2019 Harley-Davidson FXBRS Breakout 114; 2020 Harley-Davidson FXDRS FXDR 114; 2018, 2020, 2021, and 2023 Harley-Davidson FLHXS Street Glide Special; 2021 Harley-Davidson FLTRXS Road Glide Special; 2023 Harley-Davidson FXLRS Low Rider S 117; and 2022 Harley-Davidson FXLRST Low Rider ST 117.
Features:
- Bore and Application: 4.135-inch bore for 121 CI, 114-inch, and 117-inch M8 applications.
- ArmorX™ Coating: Provides piston protection in extreme conditions and helps reduce wear.
- ArmorFit™ Skirt Coating: Auto-adjusts to the cylinder wall, eliminating the need to measure clearance.
- Compression and Dome Design: 11:1 compression and a domed piston design support added power and improved flame travel.
- Friction and Lubrication: Superfinish piston pins and enhanced pin oiling help reduce friction and improve scuff resistance and lubrication.
- Ring Function: Augmented ring land details and dedicated rings support precise fit, compression, and oil control.
- Kit Contents: Includes two pistons, rings, piston pins, and circlips.
- Cylinder Head Fitment: Fits OEM and Screamin’ Eagle cylinder heads.
- Manufacturer: Made in the USA.
- Part Numbers: Distributor part number 09031680; manufacturer part number K2806.
Fitment:
2017 Harley-Davidson FLHR Road King
2017 Harley-Davidson FLHTK Ultra Limited
2017 Harley-Davidson FLHXS Street Glide Special
2017 Harley-Davidson FLTRXS Road Glide Special
2018 Harley-Davidson FLFBS Fat Boy 114
2018 Harley-Davidson FLHCS Heritage Classic 114
2018 Harley-Davidson FLHR Road King
2018 Harley-Davidson FLHTK Ultra Limited
2018 Harley-Davidson FLHXS Street Glide Special
2018 Harley-Davidson FLTRXS Road Glide Special
2018 Harley-Davidson FXBRS Breakout 114
2018 Harley-Davidson FXFBS Fat Bob 114
2019 Harley-Davidson FLFBS Fat Boy 114
2019 Harley-Davidson FLHCS Heritage Classic 114
2019 Harley-Davidson FLHR Road King
2019 Harley-Davidson FLHT Electra Glide Standard
2019 Harley-Davidson FLHTK Ultra Limited
2019 Harley-Davidson FLHXS Street Glide Special
2019 Harley-Davidson FLTRXS Road Glide Special
2019 Harley-Davidson FXBRS Breakout 114
2019 Harley-Davidson FXDRS FXDR 114
2019 Harley-Davidson FXFBS Fat Bob 114
2020 Harley-Davidson FLFBS Fat Boy 114
2020 Harley-Davidson FLHCS Heritage Classic 114
2020 Harley-Davidson FLHR Road King
2020 Harley-Davidson FLHT Electra Glide Standard
2020 Harley-Davidson FLHTK Ultra Limited
2020 Harley-Davidson FLHXS Street Glide Special
2020 Harley-Davidson FLTRXS Road Glide Special
2020 Harley-Davidson FXBRS Breakout 114
2020 Harley-Davidson FXDRS FXDR 114
2020 Harley-Davidson FXFBS Fat Bob 114
2020 Harley-Davidson FXLRS Low Rider S 114
2021 Harley-Davidson FLFBS Fat Boy 114
2021 Harley-Davidson FLHCS Heritage Classic 114
2021 Harley-Davidson FLHR Road King
2021 Harley-Davidson FLHT Electra Glide Standard
2021 Harley-Davidson FLHTK Ultra Limited
2021 Harley-Davidson FLHXS Street Glide Special
2021 Harley-Davidson FLTRXS Road Glide Special
2021 Harley-Davidson FXBBS Street Bob 114
2021 Harley-Davidson FXFBS Fat Bob 114
2021 Harley-Davidson FXLRS Low Rider S 114
2022 Harley-Davidson FLFBS Fat Boy 114
2022 Harley-Davidson FLHCS Heritage Classic 114
2022 Harley-Davidson FLHR Road King
2022 Harley-Davidson FLHT Electra Glide Standard
2022 Harley-Davidson FLHTK Ultra Limited
2022 Harley-Davidson FLHXS Street Glide Special
2022 Harley-Davidson FLHXST Street Glide ST
2022 Harley-Davidson FLTRXS Road Glide Special
2022 Harley-Davidson FLTRXST Road Glide ST
2022 Harley-Davidson FXBBS Street Bob 114
2022 Harley-Davidson FXFBS Fat Bob 114
2022 Harley-Davidson FXLRS Low Rider S 117
2022 Harley-Davidson FXLRST Low Rider ST 117
2022 Harley-Davidson FXRST Low Rider El Diablo 117
2023 Harley-Davidson FLFBS Fat Boy 114
2023 Harley-Davidson FLHCS Heritage Classic 114
2023 Harley-Davidson FLHTK Ultra Limited
2023 Harley-Davidson FLHXS Street Glide Special
2023 Harley-Davidson FLHXST Street Glide ST
2023 Harley-Davidson FLTRXS Road Glide Special
2023 Harley-Davidson FLTRXST Road Glide ST
2023 Harley-Davidson FXBBS Street Bob 114
2023 Harley-Davidson FXBR Breakout 117
2023 Harley-Davidson FXFBS Fat Bob 114
2023 Harley-Davidson FXLRS Low Rider S 117
2023 Harley-Davidson FXLRST Low Rider ST 117
2024 Harley-Davidson FLFBS Fat Boy 114
2024 Harley-Davidson FLHCS Heritage Classic 114
2024 Harley-Davidson FLHTK Ultra Limited
2024 Harley-Davidson FXBBS Street Bob 114
2024 Harley-Davidson FXBR Breakout 117
2024 Harley-Davidson FXLRS Low Rider S 117
2024 Harley-Davidson FXLRST Low Rider ST 117
2025 Harley-Davidson FXBR Breakout 117
2025 Harley-Davidson FXLRS Low Rider S 117
2025 Harley-Davidson FXLRST Low Rider ST 117