⟲ 360° — drag meThe facts.
| Model | JP MJ 001 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | Aprilia Shiver 900 (2017–2019) |
| Installation | Plug-and-play, no wiring harness modifications required |
DescriptionThe whole story▼
The JP MJ 001 addresses the Shiver 900's hesitation off a closed throttle, which is the transition every injection system finds hardest and every rider notices.
Key Features
- Aprilia Shiver 900 (2017–2019)
- 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
Ride by Wire, Early
The Shiver was among the first production motorcycles with an electronic throttle, which made its mapping a talking point long before that was normal.
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.
The Closed Loop Window
Modern controllers only trim against the oxygen sensor in a narrow band of load and revs. Outside that band the map runs open loop, and that is exactly where an added correction has room to work.
With a Sports Filter
The effect mirrors an exhaust change and the answer is the same. Owners who fit both are further from the factory mixture than either change alone would put them.
Filters and Airboxes
A less restrictive filter shifts the mixture in the same direction as a freer exhaust. Owners who fit both have moved further from the factory calibration than either change alone accounts for.
Sequence With an Exhaust
Fit the silencer, ride it, then fit the module. Two changes at once tell the rider nothing about either, and the exhaust is the one that moves the mixture furthest.
A Note on Dyno Runs
A power run measures full throttle from low revs to the limiter. That is one line through a map with hundreds of cells, and it is not the line this module was designed to change.
On a Twin Versus a Four
A large twin with widely spaced firing pulses shows lean fuelling more obviously than a smooth four does. Owners of vee twins and parallel twins tend to notice more.
Fitment and Compatibility
- Aprilia Shiver 900 (2017–2019)
Specifications
| Model | JP MJ 001 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | Aprilia Shiver 900 (2017–2019) |
| Installation | Plug-and-play, no wiring harness modifications required |
What's includedEverything in the box▼
- 1x power module
FitmentWhich bikes this fits▼
- Aprilia Shiver 900 (2017–2019)
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