HARLEY DAVIDSON · MT21M ECU

HARLEY DAVIDSON CVO MT21M tuning files

The HARLEY DAVIDSON CVO on the MT21M, mapped from stock file to finished result. Across the matched variants stock power runs from 86 to 90 HP. 11 distinct variants are catalogued here. We start conservative here — Stage 1 and Stage 2 are the dependable baseline. Your file is built against the exact ECU software on the car, then operator-verified.

Upload your file →All CVO coverage Custom ECU tuning file service

Available solutions

What we can run on the MT21M for this vehicle — the precise options narrow down by engine and software version.

Stage 1 Stage 2

Engine variants & ECU software

11 distinct variants for the HARLEY DAVIDSON CVO on the MT21M ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 21T131_se
Calibration: 21T131_se

Variant 2

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 41000849D
Calibration: 41000849D

Variant 3

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 41000854C
Calibration: 41000854C

Variant 4

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 41000894C
Calibration: 41000894C

Variant 5

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 41000896D
Calibration: 41000896D

Variant 6

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 41000911C
Calibration: 41000911C

Variant 7

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP

Variant 8

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 41000897E
Calibration: 41000897E

Variant 9

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 4100089D
Calibration: 4100089D

Variant 10

ECU

Catalog engine: 1868 90HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 90 HP
SW upgrade: 41000852E
Calibration: 41000852E

Variant 11

ECU

Catalog engine: 1896 86HP
Controller brand: DELPHI
ECU: MT21M
Stock power: 86 HP
SW upgrade: 41000862F
Calibration: 41000862F

Related vehicles

Other vehicles built on the MT21M controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the HARLEY DAVIDSON CVO on the MT21M?

Stage 1, Stage 2. The exact set depends on the specific engine and software version.

Do you cover the MT21M ECU software on this model?

Yes — the HARLEY DAVIDSON CVO on the MT21M ECU is part of the catalog. Upload your original file and it is matched to the right calibration before any work is done.

How is the file delivered?

Through the TuningBay workflow with operator validation and one safe, sensible result per job. Files we deliver, we stand behind.