Harley Davidson 1250 Night Rod / V-Rod / Sportster 2021 - ... 1250 Sportster S 121hp
Real standard and upgraded performance figures for the 1250 Sportster S 121hp engine in the Harley Davidson 1250 Night Rod / V-Rod / Sportster 2021 - ....
Below: measured output for the 1250 Sportster S 121hp in the Harley Davidson 1250 Night Rod / V-Rod / Sportster 2021 - ..., standard vs. remapped, in both horsepower and torque.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 121 | 125 |
| Stage 1 | 129 | 133 |
| Stage 2 | 133 | 137 |
- Make
- Harley Davidson
- Model
- 1250 Night Rod / V-Rod / Sportster
- Generation
- 2021 - ...
- Engine
- 1250 Sportster S 121hp
- Fuel type
- Petrol
Frequently asked questions
Is Stage 1 tuning safe for the Harley Davidson 1250 Night Rod / V-Rod / Sportster 2021 - ... 1250 Sportster S 121hp?
Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.
How much more power does the 1250 Sportster S 121hp make after tuning?
Standard output is 121 HP / 125 Nm; Stage 1 on this engine typically reaches 129 HP / 133 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Harley Davidson 1250 Night Rod / V-Rod / Sportster 2021 - ... 1250 Sportster S 121hp remap take?
Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.
Can the 1250 Sportster S 121hp be reverted to its original file?
Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.