JetPrime JP SPK 024 kill switch for Kawasaki Ninja 400 — view 1 360° — drag me
Approximately 350 g
02 · Data & docs

The facts.

Technical data
BrandJetPrime
Part numberJP SPK 024 (black)
FunctionIgnition block replacement kill switch button
MaterialSolid-machined Ergal (7075 aluminium)
Button protectionIP69K
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 Ninja 400 (2018–2024)
Road approvalNone — closed-circuit and race use only
DescriptionThe whole story

The Ninja 400 is the backbone of SuperSport 300 racing, and a large share of those bikes run Mectronik engine management rather than the Kawasaki original. The JP SPK 024 is the kill switch for that configuration — same idea as the standard part, different connector.

Key Features

  • For Ninja 400 race bikes running a Mectronik ECU and loom
  • Deletes the ignition block, barrel and key
  • About 350 g off the top of a machine that is already light
  • Machined Ergal housing with an IP69K push button
  • Plugs into the Mectronik ignition connector — no adaptation
  • Built for a bike that stays on a trailer between meetings

Which Switch for Which Bike

JetPrime lists two Ninja 400 kill switches. The standard part suits a bike on its original Kawasaki loom; this SuperSport version suits a bike converted to Mectronik. The physical switch is the same, the harness end is not, and ordering the wrong one means a part that will not connect. The ECU under the seat is the quickest way to tell them apart.

Grams on a 400

Three hundred and fifty grams sounds slight until you set it against a bike that weighs under 170 kg wet and races in a class where everyone is on the same machine. It comes off the steering head, the single worst place on a motorcycle to carry weight, and it comes off for the price of a part you were going to remove anyway.

Fitment and Compatibility

  • Kawasaki Ninja 400 with Mectronik management (2018–2024)

Road Approval

None. This is a competition part for a race-prepared motorcycle and is sold for closed-circuit use only.

Between Sessions

The practical case for deleting the barrel on a race 400 is mostly about time. No key to find, nothing to leave in the ignition, nothing to seize after a wet meeting. The switch is sealed to IP69K, so it can be jet-washed with the rest of the bike rather than worked around, and there is no lock cylinder to dry out afterwards.

Specifications

  • Brand: JetPrime
  • Part number: JP SPK 024 (black)
  • Function: ignition block replacement kill switch button
  • Material: solid-machined Ergal (7075 aluminium)
  • Button protection: IP69K
  • 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 Ninja 400 Mectronik (2018–2024)
  • Road approval: none — closed-circuit and race use only
FitmentWhich bikes this fits
  • Kawasaki Ninja 400 (2018–2024)
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08 · Paddock

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