JetPrime JP KS KA004 kill switch for Kawasaki ZX-4 RR — view 1 360° — drag me
Approximately 350 g
02 · Data & docs

The facts.

Technical data
ModelJP KS KA004
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsKawasaki ZX-4 RR (2024–2026)
InstallationPlug-and-play, no wiring harness modifications required
Weight savedApproximately 350 g versus the standard ignition block
Supplied withKey Box for the original key and immobiliser antenna
InstallationPlug-and-play, fully reversible, no loom modification
FitmentKawasaki ZX-4 RR (2024–2026)
Road approvalNone — closed-circuit and race use only
DescriptionThe whole story

The JP KS KA004 is the racing ignition switch for the ZX-4 RR, with the connector the motorcycle already has and nothing in the loom cut.

Key Features

  • Kawasaki ZX-4 RR (2024–2026)
  • Replaces the original ignition block, key and lock
  • Around 350 g off the top yoke
  • CNC-machined from solid Ergal
  • IP69K sealed push button
  • Plug-and-play on the motorcycle's own connector

Four Cylinders, Four Hundred

Kawasaki put an inline four back into a small class nobody else was serving. It revs to fifteen thousand and it belongs on a circuit more than anywhere else.

Three Hundred and Fifty Grams

That is the manufacturer's figure for what leaves the top yoke. It is a small number in a place where mass matters more than most.

What the Original Block Is

A lock barrel, a switch pack and on modern bikes an immobiliser aerial, all in one casting bolted through the top yoke.

A Sealed Unit

Everything electrical inside is closed against water and vibration, which is what separates this from a switch bought by the metre.

Machined, Not Moulded

Ergal cut from solid, anodised, and shaped to the yoke of one motorcycle. It is a small part made the expensive way for a reason.

No Software

Nothing is flashed and no controller is told anything. The part is a switch and it behaves like one from the first ride.

The Plate Follows the Yoke

Shape, hole spacing and thickness all belong to one motorcycle. A part from another model will not sit flat and should not be persuaded.

What a Pressure Washer Does

It drives water past most seals. The IP69K rating is the answer to that specific problem and it is why the switch costs what it does.

The Colour Choice

Where several finishes exist, they are the same part with a different anodising bath. Nothing functional changes between them.

Race Harness Versions

Some models appear twice because a kit loom arranges the ignition side differently. Those are separate part numbers and the distinction is electrical rather than cosmetic. Fitting the road version to a race-wired machine does not work and is not a shortcut.

Fitment and Compatibility

  • Kawasaki ZX-4 RR (2024–2026)

Specifications

Model JP KS KA004
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Kawasaki ZX-4 RR (2024–2026)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x handlebar switch
FitmentWhich bikes this fits
  • Kawasaki ZX-4 RR (2024–2026)
07 · Support

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08 · Paddock

Before you go.

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