⟲ 360° — drag meThe facts.
| 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 |
| Weight saved | Approximately 350 g versus the standard ignition block |
| Supplied with | Key Box for the original key and immobiliser antenna |
| Installation | Plug-and-play, fully reversible, no loom modification |
| Fitment | Kawasaki ZX-4 RR (2024–2026) |
| Road approval | None — 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)
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Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.