HP Tuners Adds Support for Select 2021–2024 Harley-Davidson Motorcycles

BUFFALO GROVE, IL, July 1, 2026—HP Tuners is pleased to announce new custom tuning and diagnostics support for select 2021–2024 Harley-Davidson motorcycles equipped with the Delphi MT21M ECM. This release brings HP Tuners’ professional-grade calibration and diagnostic ecosystem to supported Cruiser, Touring, Sportster, Trike, and Adventure Touring models using MPVI4, VCM Suite, and the Moto Euro5 OBDII Adapter Cable.

Built around the factory ECM, this new support provides riders and professional tuners with expanded calibration access for custom tuning, diagnostics, and data logging while supporting common performance modifications.

Supported Harley-Davidson Applications

Select 2021-2024 Cruiser Models

• 2021 – 2022 Breakout 114 (FXBRS)
• 2023 – 2024 Breakout 117 (FXBR)
• 2021 – 2023 Fat Bob 114 (FXFBS)
• 2023 Fat Boy Anniversary (FLFBSASNV)
• 2021 – 2024 Fat Boy 114 (FLFBS)
• 2021 Heritage Classic 107 (FLHC)
• 2021 – 2024 Heritage Classic 114 (FLHCS)
• 2022 Low Rider El Diablo 117 (FXRST)
• 2021 – 2024 Low Rider S 114 (FXLRS)
• 2022 – 2024 Low Rider ST 117 (FXLRST)
• 2021 Softail Slim 107 (FLSL)
• 2021 – 2024 Softail Standard 107 (FXST)
• 2021 Sport Glide 107 (FLSB)
• 2021 – 2024 Street Bob 114 (FXBBS)

Select 2021-2024 Touring Models

• 2021 CVO Limited (FLHTKSE)
• 2021 – 2023 CVO Street Glide (FLHXSE)
• 2023 Electra Glide Highway King (FLHFB)
• 2021 Electra Glide Revival (FLH)
• 2021 – 2022 Electra Glide Standard (FLHT)
• 2023 Heritage Classic Anniversary (FLHCSANV)
• 2023 Road Glide (FLTRX)
• 2023 Road Glide 3 (FLTRT)
• 2021 – 2022 Road Glide Special (FLTRXS)
• 2022 – 2023 Road Glide ST (FLTRXST)
• 2021 – 2022 Road King (FLHR)
• 2021 – 2024 Road King Special (FLHRXS)
• 2021 – 2023 Street Glide (FLHX)
• 2023 Steet Glide Anniversary (FLHXSANV)
• 2021 – 2023 Street Glide Special (FLHXS)
• 2022 – 2023 Street Glide ST (FLHXST)
• 2023 Ultra Limited Anniversary (FLHTKANV)

Select 2021-2023 Sport Models

• 2021 – 2022 Sportster S (RH1250S)

Select 2021-2023 Trike Models

• 2022 CVO Tri Glide (FLHCUTGSE)
• 2021 – 2022 Freewheeler (FLRT)
• 2021 – 2023 Tri Glide Ultra (FLHTCUTG)

Select 2021-2022 Adventure Touring Models

• 2021 – 2022 Pan America 1250 (RA1250)
• 2021 – 2022 Pan America 1250 Special (RA1250S)

Key Details

• Controller: Delphi MT21M ECM
• Credits Required: 4 Universal Credits
• Devices Supported: MPVI4 Interface
• Remote Tuning: Supported via RTD4 through TDN (2 Universal Credits)
• Required Accessory: Moto Euro5 OBDII Adapter Cable
• Software Required: Latest VCM Suite Release
• Upgrade Service Required: No

This release gives riders and tuning professionals the flexibility to build custom calibrations using the factory ECM while benefiting from HP Tuners’ expanded parameter access, diagnostics, and data logging capabilities. It also enables streamlined remote tuning workflows through RTD4 and TDN for supported applications.

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ABOUT HP TUNERS—HP Tuners is the leading diagnostic and calibration solution for vehicle aftermarket performance with over 20 years of expertise. From diagnostics, data logging, scanning, custom calibration, and more, HP Tuners offers the most comprehensive solution for OBDII-equipped import, domestic, and powersports vehicles. Connect with HP Tuners at www.hptuners.com.