⟲ 360° — drag meThe facts.
| Model | JP MJ 003 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | Hyosung GD250 R (2015–2015) |
| Installation | Plug-and-play, no wiring harness modifications required |
DescriptionThe whole story▼
The JP MJ 003 gives the GD250 R a fuel curve tailored to that engine rather than to every market the model was ever sold into.
Key Features
- Hyosung GD250 R (2015)
- 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
A Korean Single
Hyosung built the GD250R as a faired learner machine with a 249 cc single. It is straightforward transport with straightforward injection.
Preset, Not Programmable
There is no laptop, no software and no session on a dyno. JetPrime supplies the module with a curve worked out for that engine, and the owner's job ends at plugging it in. That is the whole difference between this and the programmable unit alongside it.
A Second Rider
Carrying a passenger loads the engine differently and exposes lean cruise settings more clearly. Owners who tour two-up frequently notice the difference before owners who ride alone do.
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.
Rider Aids Are Blind to It
Traction control reads wheel speeds, not injector pulses. Nothing about the module's presence enters the calculation for any electronic aid on the motorcycle.
Before a Dealer Visit
Most owners unplug it. It takes five minutes, leaves the connectors as they were and removes a conversation that is easier avoided than had.
The Engine Is Not at Risk
The correction is small, it is applied in the rich direction where it matters and the standard controller's protections all remain active. This is not a device that can lean an engine out.
After a Service
Nothing about the module needs resetting when the motorcycle is serviced. Filters, plugs and oil changes have no interaction with it whatsoever.
Fitment and Compatibility
- Hyosung GD250 R (2015–2015)
Specifications
| Model | JP MJ 003 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | Hyosung GD250 R (2015–2015) |
| Installation | Plug-and-play, no wiring harness modifications required |
What's includedEverything in the box▼
- 1x power module
FitmentWhich bikes this fits▼
- Hyosung GD250 R (2015)
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Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
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.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
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.
Our team will personally help you choose the right gear or part — around 24h for a reply.