JetPrime JP MJ 008 Yamaha XSR900 GP — Memjet EVO power module — view 1 360° — drag me
02 · Data & docs

The facts.

Technical data
ModelJP MJ 008
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsYamaha XSR900 GP (2024–2026)
InstallationPlug-and-play, no wiring harness modifications required
DescriptionThe whole story

The JP MJ 008 is a two hundred gram module for the XSR900 GP that does one thing: it lengthens or shortens the injector pulse the standard controller decided on.

Key Features

  • Yamaha XSR900 GP (2024–2026)
  • 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

Bodywork From the Grid

Yamaha added a half fairing and clip-ons drawn from their eighties racing machines. Underneath it is the current XSR with the same triple.

Fuel Consumption

Expect no meaningful change. A richer cruise setting costs a little and a smoother throttle hand saves a little, and in practice the two cancel. Nobody should buy this expecting to notice anything at the pump.

It Does Not Touch Ignition

Advance and retard are the standard controller's business. A fuel module cannot alter them, which limits what it can achieve and also removes the commonest way to damage an engine electronically.

Cold Mornings

Starting and warm-up enrichment belong to the standard controller. A module changes nothing there, and an owner hoping to cure a cold-start problem is looking at the wrong part.

Approval and Local Rules

Fuelling forms part of the emissions approval in most European markets. Changing it moves the motorcycle outside its approved state, which is worth understanding rather than discovering.

Invisible to the Rider Aids

Traction control and the rest read wheel speeds, lean angle and throttle position. None of them can see an injector pulse being lengthened.

Riding Modes Still Work

On a ride-by-wire machine the rain and sport settings continue to shape the throttle exactly as before. The module operates downstream of all of that and cannot see which mode is selected.

Comparing the Two JetPrime Units

This one arrives finished. The programmable unit arrives empty and expects an owner with software, a laptop and preferably a dyno. Neither is better; they answer different questions.

Fitment and Compatibility

  • Yamaha XSR900 GP (2024–2026)

Specifications

Model JP MJ 008
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Yamaha XSR900 GP (2024–2026)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x power module
FitmentWhich bikes this fits
  • Yamaha XSR900 GP (2024–2026)
07 · Support

Questions, one topic at a time.

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