⟲ 360° — drag meThe facts.
| Model | JP MJ 001 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | Harley Davidson Dyna Street BOB FXDB-I (2003–2017) |
| Installation | Plug-and-play, no wiring harness modifications required |
DescriptionThe whole story▼
The JP MJ 001 is the preset version of JetPrime's fuel module for the Dyna Street BOB FXDB-I, with nothing to program and nothing to configure after it is plugged in.
Key Features
- Harley Davidson Dyna Street BOB FXDB-I (2003–2017)
- Preset fuel module, no programming required
- Corrects the mixture without remapping the original electronics
- Plug-and-play with model-specific wiring
- Around 200 g, fitted in an evening
- Unplugs at any time, nothing is written to the motorcycle
Rubber Mounted Twin Cam
The Dyna frame isolates the engine on rubber mounts, which lets Harley run a big vee twin without shaking the rider off at idle.
The Lambda Sensor Keeps Working
At small openings the controller still trims the mixture against the oxygen sensor, which means the module works alongside that loop rather than fighting it. At larger openings the sensor drops out and the module's correction is what remains.
Smoothness Is the Product
Riders who fit one describe a throttle that picks up cleanly from closed and holds a steady speed without hunting. Nobody describes a hole shot. The claim and the experience match unusually well here.
Where It Makes the Biggest Difference
An older injected machine with an aftermarket exhaust, ridden briskly on roads. That combination is where the standard mixture is furthest from what the engine now wants.
Approval and Local Rules
Fuelling forms part of the emissions approval in most European markets. Changing it moves the motorcycle outside its approved state, which is worth understanding rather than discovering.
Intake Changes Too
A high-flow filter shifts things the same way. Owners running both an exhaust and a filter are the furthest from the factory calibration and have the most to gain.
Why Not Simply Adjust the Fuel Screw
Because there is no fuel screw. Injection removed every mechanical adjustment a carburettor offered, and everything that used to be a screwdriver job is now a decision made in software.
Nothing Draws Current at Rest
The module is powered from the injector circuit and does nothing with the ignition off. There is no parasitic drain and no reason to disconnect it for storage.
Fitment and Compatibility
- Harley Davidson Dyna Street BOB FXDB-I (2003–2017)
Specifications
| Model | JP MJ 001 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | Harley Davidson Dyna Street BOB FXDB-I (2003–2017) |
| Installation | Plug-and-play, no wiring harness modifications required |
What's includedEverything in the box▼
- 1x power module
FitmentWhich bikes this fits▼
- Harley Davidson Dyna Street BOB FXDB-I (2003–2017)
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Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
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Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
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