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Remapping Harley-Davidson 121

1 engines · 1 generations

Compare every Harley-Davidson 121 engine we remap: stock figures, Stage 1 gains and prices, plus ethanol (E85) options.

1
engines
+0 hp
up to
+0 Nm
up to
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Stage 1 from

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Search for your vehicle to see remapping options, expected gains and our prices.

Harley-Davidson 121 — engines
EngineStockAfter Stage 1GainE85 ethanolFrom
2023
121 117ch 117 hp — — Ethanol conversion available Unavailable

Switch to ethanol (E85)

1 Harley-Davidson 121 engine is compatible with E85 conversion in our catalogue. Ethanol saves up to 50% at the pump and cuts your carbon footprint — with no compromise on performance. Good for your wallet and for the planet.

Find your vehicle
1
E85-compatible engines

Other models Harley-Davidson

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See all models Harley-Davidson

FAQ

What gains can I expect on a Harley-Davidson 121?
Gains depend on the exact engine: the comparison table above shows stock vs Stage 1 power and torque for each Harley-Davidson 121 version.
How much is a Harley-Davidson 121 Stage 1?
Pricing is shown per engine above. Pick your engine for the exact price.
Is E85 conversion available on the Harley-Davidson 121?
Yes, 1 Harley-Davidson 121 engine is E85-compatible in our catalogue. Ethanol can halve your fuel bill and shrink your carbon footprint, with performance left intact.
Where can I get my Harley-Davidson 121 remapped?
Our workshop is in Lathuile (74210), at the southern end of Lake Annecy, by appointment, Monday to Friday 9am–6pm and Saturday 8am–12pm. We can also come to your home within about 1h30 of Annecy (power socket and internet connection required; travel costs may apply). Find Alpes Reprog on Google Maps