JetPrime JP ES 003 Kawasaki — SLS/AIS Block-Off Plate — view 1 360° — drag me
02 · Data & docs

The facts.

Technical data
ModelJP ES 003
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsKawasaki Z650 (2017–2026)
InstallationPlug-and-play, no wiring harness modifications required
FitmentKawasaki Z650 (2017–2026) / Kawasaki Z650 S (2017–2026) / Kawasaki Z650RS (2022–2026)
Road approvalNone — closed-circuit and race use only
DescriptionThe whole story

The JP ES 003 blanks the Z650's air injection opening in the head with a billet cover on an O-ring.

Key Features

  • Kawasaki Z650 (2017–2026)
  • Blanks the secondary air ports in the head
  • Machined from solid aluminium
  • O-ring sealed, no jointing compound
  • Original fastener positions
  • Standard housing refits at any time

The Naked 650 Twin

Sixty-eight horsepower and a low seat in a light chassis. The Z650 is the sensible middleweight roadster and it sells accordingly.

A Hundred and Eighty-Seven Kilograms

Wet, which is genuinely light for the class and the reason the Z650 flatters riders who are still learning to be smooth.

Aluminium Instead

A cover machined from solid, sealing on an O-ring in a turned groove. There is nothing inside it to age and nothing to inspect for the life of the engine.

Homologation

The system is part of the motorcycle's approval where it is fitted, and removing it moves the machine into competition use in those markets.

Not an Engine Job

Nothing is opened, nothing is drained and nothing internal is disturbed. It is an external component on an external face.

What Is Gained

One fewer perishable component, a tidier top end and an exhaust port that cannot admit anything. No power, no throttle response and no consumption change.

Why an O-Ring

A machined face against a rubber ring seals reliably and separates cleanly years later. Paper and compound both bond to the head and have to be scraped away.

Careful Threads

On an older machine the fasteners have been undisturbed for years. Working slowly is worth the extra minutes it costs.

The Sensible Middleweight

Kawasaki has sold this platform in enormous numbers to riders moving up, and a great many of those owners modify carefully rather than extensively. This is usually among the first things they do.

Available Restricted

An A2 version keeps the Z650 within a limited licence without an electronic strangle, which is why it sells so well to riders moving up from something smaller.

Fitment and Compatibility

  • Kawasaki Z650 (2017–2026)
  • Covers the Z650 S versions of this model

Specifications

Model JP ES 003
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Kawasaki Z650 (2017–2026)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x block-off plate
FitmentWhich bikes this fits
  • Kawasaki Z650 (2017–2026)
07 · Support

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08 · Paddock

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