JetPrime JP MJ 009 Yamaha MT-03A — Memjet EVO power module — view 1 360° — drag me
02 · Data & docs

The facts.

Technical data
ModelJP MJ 009
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsYamaha MT-03A (2016–2024)
InstallationPlug-and-play, no wiring harness modifications required
DescriptionThe whole story

The JP MJ 009 is fitted to the MT-03A to make an injected engine pleasanter rather than faster, and the description says exactly that.

Key Features

  • Yamaha MT-03A (2016–2024)
  • 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 Small Naked Twin

Yamaha's 321 cc twin without bodywork, aimed at licence-restricted riders and mapped for smoothness rather than for excitement.

Diagnostics Still Work

Because nothing is written to the original controller, the service history stays readable and any fault the motorcycle develops is reported normally. A masked fault memory is one of the real costs of the alternatives.

The Diagnostic Question

Because the original controller is untouched, its fault memory stays honest. Anybody who has chased a fault on a motorcycle with a flashed controller understands why that matters.

Against Flashing the Controller

A full remap can do considerably more and is considerably harder to undo. This module is the narrower, cheaper and entirely reversible option, and for a great many owners that is the right trade.

The Clearest Case

Older injection, an aftermarket silencer and a rider who notices the hesitation off a closed throttle. That combination is what this module was drawn for.

The Mechanism, Once More

An injector is a valve that opens for a measured time. Fuel quantity is that time. A module intercepts the instruction and lengthens or shortens it, and everything else about the motorcycle carries on unchanged.

Commuting

Stop-start traffic is the opposite case. Every junction is a transition off a closed throttle, which is exactly the region where a lean factory map is most obviously lean.

Popping on Overrun

Some of it comes from the emissions hardware in the exhaust rather than from the mixture, so a fuel module reduces it in some cases and not in others.

Fitment and Compatibility

  • Yamaha MT-03A (2016–2024)

Specifications

Model JP MJ 009
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Yamaha MT-03A (2016–2024)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x power module
FitmentWhich bikes this fits
  • Yamaha MT-03A (2016–2024)
07 · Support

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