⟲ 360° — drag meThe facts.
| Model | JP MJ 004 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | BMW R1250GS (2018–2023) |
| Installation | Plug-and-play, no wiring harness modifications required |
DescriptionThe whole story▼
The JP MJ 004 is fitted to the R1250GS to make an injected engine pleasanter rather than faster, and the description says exactly that.
Key Features
- BMW R1250GS (2018–2023)
- 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
ShiftCam
BMW's variable valve timing gives the boxer two different cam profiles depending on load and revs. The transition between them is the most interesting thing about how it fuels.
What It Cannot Fix
A worn throttle position sensor, a leaking inlet rubber, a clogged filter or a sticking valve. A module corrects fuel quantity and nothing else. Fitting one to hide a mechanical fault postpones the diagnosis rather than avoiding it.
Nothing to Service
There is no interval, no filter and nothing to inspect. The module is sealed and it either works or it does not, which after the first ride it demonstrably does.
Lambda Control Is Not Bypassed
The module works with the oxygen sensor loop rather than around it. Nothing is disconnected, spoofed or hidden, which is one reason the fault memory stays clean.
Fitted After an Exhaust
The order matters. A silencer changes the mixture, and judging what the module then contributes is only possible if one change has already settled.
The Connectors Do the Work
A harness with the correct plugs moulded on is what makes this a twenty-minute job rather than an afternoon with a soldering iron and a wiring diagram.
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.
What the Seat Hides
On most modern motorcycles the injector harness runs under the seat within reach of the fuel pump connector. That is why so many of these installations are a twenty-minute job.
Fitment and Compatibility
- BMW R1250GS (2018–2023)
Specifications
| Model | JP MJ 004 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | BMW R1250GS (2018–2023) |
| Installation | Plug-and-play, no wiring harness modifications required |
What's includedEverything in the box▼
- 1x power module
FitmentWhich bikes this fits▼
- BMW R1250GS (2018–2023)
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