JetPrime JP CJP 012D Harley Davidson Softail LOW Rider ST Fxlrst — Programmable Control Unit — view 1 360° — drag me
02 · Data & docs

The facts.

Technical data
ModelJP CJP 012D
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsHarley Davidson Softail LOW Rider ST Fxlrst (2022–2026)
InstallationPlug-and-play, no wiring harness modifications required
DescriptionThe whole story

The JP CJP 012D manages injector opening time on the Softail LOW Rider ST Fxlrst across a full two-axis map, programmed on a PC and stored as a file the owner keeps.

Key Features

  • Harley Davidson Softail LOW Rider ST Fxlrst (2022–2026)
  • Fully programmable fuel map, written on a PC
  • Complete two-axis management: engine speed and load
  • For engines with an aftermarket exhaust or air filter
  • Plug-and-play with model-specific wiring
  • Unplugs at any time, nothing is written to the motorcycle

A Bagger From the Factory

The ST adds a frame-mounted fairing and hard panniers to the Low Rider S. It is Harley building what customisers had been building for years.

The Honest Summary

A programmable fuel controller for an owner who has modified the engine and wants the mixture to match. It rewards effort and it does nothing at all without it.

Reversibility in Practice

The original connectors go back together in minutes and nothing has been written to the motorcycle. That matters at a service, at a sale and during any diagnosis.

A Rich Map Is Not a Safe Map

Excess fuel washes bores and fouls plugs. The target is correct, not generous, and a wideband is what tells the difference between the two.

Reading a Wideband

The display shows the mixture in real time. Holding a steady load and watching the number is the entire technique, and it is considerably duller than it sounds.

The Second Owner

A motorcycle sold with this fitted should come with its map file. Without it the next owner has a programmable unit and a blank sheet.

The Laptop in the Paddock

Somewhere dry, charged and with the cable already attached to the motorcycle. Mapping between sessions is the point of this unit and it needs a working bench.

The Reward for the Effort

An engine that pulls cleanly from anywhere, holds a steady speed without hunting and answers the throttle the same way on every corner exit.

Riding the Empty Map First

Worth insisting on. A motorcycle you have felt with every cell at zero gives you a reference; one you started changing immediately gives you nothing to compare against.

Fitment and Compatibility

  • Harley Davidson Softail LOW Rider ST Fxlrst (2022–2026)

Specifications

Model JP CJP 012D
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Harley Davidson Softail LOW Rider ST Fxlrst (2022–2026)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x control unit
FitmentWhich bikes this fits
  • Harley Davidson Softail LOW Rider ST Fxlrst (2022–2026)
07 · Support

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