⟲ 360° — drag meThe facts.
| Model | JP MJ 004 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | BMW R1200GS (2004–2018) |
| Installation | Plug-and-play, no wiring harness modifications required |
DescriptionThe whole story▼
The JP MJ 004 takes the R1200GS's factory mixture and adds the correction the engine actually wants, without any of the original electronics being reprogrammed.
Key Features
- BMW R1200GS (2004–2018)
- 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
The Air and Water Boxer
BMW's 2013 redesign put water cooling around the exhaust side of the heads and moved the throttle bodies. Fuelling behaviour changed noticeably with it.
With an Aftermarket Exhaust
A freer silencer changes what the engine can pass and the standard controller can only compensate so far. This is the commonest reason owners look at a fuel module, and it is the situation where the difference is most obvious.
What Changes at the Bottom
The first eighth of throttle travel is where a lean map shows itself, as a hesitation or a jerk when picking up drive. That transition is where a module earns its money on almost every motorcycle.
Model-Specific Wiring
JetPrime supplies the harness for the chosen motorcycle with the correct connectors moulded on. It is the part of the product that costs the most to develop and the part nobody thinks about.
Where the Hesitation Lives
Closed to just-open is the hardest transition for any injection system, because the airflow is changing faster than the sensors can report it. Every complaint about snatchy fuelling traces back to that moment.
Why Any of This Is Necessary
Emissions regulation has tightened faster than engines have changed, and manufacturers meet it partly by running lean where the test looks. The consequence is felt by the rider rather than measured by the laboratory.
Track Days
On a circuit the throttle is either shut or open and the transition matters less than it does on a road. Riders who only ride circuits will notice this module least.
Closed Loop and Open Loop
Below a certain load the controller trims against the oxygen sensor; above it, it follows the stored map alone. The second region is larger than most riders expect and it is where a module has free rein.
Fitment and Compatibility
- BMW R1200GS (2004–2018)
Specifications
| Model | JP MJ 004 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | BMW R1200GS (2004–2018) |
| Installation | Plug-and-play, no wiring harness modifications required |
What's includedEverything in the box▼
- 1x power module
FitmentWhich bikes this fits▼
- BMW R1200GS (2004–2018)
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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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