HARLEY DAVIDSON · J1850 ECU

HARLEY DAVIDSON Fat Boy J1850 tuning files

Here is what the catalog holds for the HARLEY DAVIDSON Fat Boy on the J1850. The matched variants sit between 64 and 120 HP from the factory. For this platform the dependable path begins with Stage 1 and Stage 2. Each file is tied to the precise software on your car and checked before it goes out.

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Available solutions

Applicable work for the J1850 on this vehicle. The available set firms up once the exact engine and software are known.

Stage 1 Stage 2

Engine variants & ECU software

14 distinct variants for the HARLEY DAVIDSON Fat Boy on the J1850 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 1584 120HP
Controller brand: DELPHI
ECU: J1850
Stock power: 120 HP
SW upgrade: 32900-07D
Calibration: 32900-07D

Variant 2

ECU

Catalog engine: 1584 120HP
Controller brand: DELPHI
ECU: J1850
Stock power: 120 HP
ECU SW: 159
ECU HW: 32900-07D
SW upgrade: 32900-07C
Calibration: 32900-07C

Variant 3

ECU

Catalog engine: 1584 120HP
Controller brand: DELPHI
ECU: J1850
Stock power: 120 HP
SW upgrade: 32903-07D
Calibration: 32903-07D

Variant 4

ECU

Catalog engine: 1690 84HP
Controller brand: DELPHI
ECU: J1850
Stock power: 84 HP
SW upgrade: 32900-07E
Calibration: 32900-07E

Variant 5

ECU

Catalog engine: 1580 73HP
Controller brand: DELPHI
ECU: J1850
Stock power: 73 HP
SW upgrade: 32030-05C
Calibration: 32030-05C

Variant 6

ECU

Catalog engine: 1580 73HP
Controller brand: DELPHI
ECU: J1850
Stock power: 73 HP
SW upgrade: 32899-05C
Calibration: 32899-05C

Variant 7

ECU

Catalog engine: 1580 73HP
Controller brand: DELPHI
ECU: J1850
Stock power: 73 HP
SW upgrade: 33269-05B
Calibration: 33269-05B

Variant 8

ECU

Catalog engine: 1580 73HP
Controller brand: DELPHI
ECU: J1850
Stock power: 73 HP

Variant 9

ECU

Catalog engine: 1580 73HP
Controller brand: DELPHI
ECU: J1850
Stock power: 73 HP
SW upgrade: 32767-05A
Calibration: 32767-05A

Variant 10

ECU

Catalog engine: 1580 67HP
Controller brand: DELPHI
ECU: J1850
Stock power: 67 HP
SW upgrade: 176AE106-000
Calibration: 176AE106-000

Variant 11

ECU

Catalog engine: 1450 64HP
Controller brand: DELPHI
ECU: J1850
Stock power: 64 HP
SW upgrade: X32763-01E
Calibration: X32763-01E

Variant 12

ECU

Catalog engine: 1450 64HP
Controller brand: DELPHI
ECU: J1850
Stock power: 64 HP
SW upgrade: 105HB025-001105HB025
Calibration: 105HB025-001105HB025

Variant 13

ECU

Catalog engine: 1450 64HP
Controller brand: DELPHI
ECU: J1850
Stock power: 64 HP
SW upgrade: X32767-01D
Calibration: X32767-01D

Variant 14

ECU

Catalog engine: 1450 64HP
Controller brand: DELPHI
ECU: J1850
Stock power: 64 HP
SW upgrade: X32761-01D
Calibration: X32761-01D

Related vehicles

Other vehicles built on the J1850 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 Fat Boy on the J1850?

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

Do you cover the J1850 ECU software on this model?

Yes — the HARLEY DAVIDSON Fat Boy on the J1850 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.