JetPrime JP SPK 015 kill switch for Yamaha R3 — view 1 360° — drag me
Approximately 350 g
02 · Data & docs

The facts.

Technical data
BrandJetPrime
Part numberJP SPK 015 (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
FitmentYamaha R3 (2019–2021)
Road approvalNone — closed-circuit and race use only
DescriptionThe whole story

The R3 shares its class with the Ninja 400 and a good deal of its paddock culture, including the move to Mectronik engine management on serious builds. JP SPK 015 is the kill switch cut for those bikes: an R3 SuperSport 300 machine running the Mectronik loom.

Key Features

  • For R3 race bikes on Mectronik management, 2019 through 2021
  • Replaces the ignition block outright — no key, no barrel
  • Approximately 350 g removed from the steering head
  • Solid-machined Ergal, anodised, with an IP69K push button
  • Connects directly to the Mectronik ignition plug
  • No immobiliser to accommodate on a full race loom

Not the Standard R3 Part

A road-going R3 on its original Yamaha loom needs the standard kill switch, not this one. The SuperSport version exists because the Mectronik harness terminates the ignition circuit differently. It is a five-second check — look for the Mectronik ECU — and it saves returning a part that was never going to plug in.

Built for a Short, Hard Life

Race bikes get washed more aggressively than road bikes and stored in worse conditions. The IP69K rating on the button covers close-range cleaning with 80 °C water at 100 bar, which is a genuinely severe test and a good deal more than a paddock jet wash will do. The Ergal housing around it is cut from solid, so there is no casting porosity to trap water.

Fitment and Compatibility

  • Yamaha R3 with Mectronik management (2019–2021)

Road Approval

None. Competition use only, on closed circuits.

Mounting

The switch occupies the original barrel's footprint and uses its mounting points, so the top yoke needs no modification and nothing has to be drilled. On an R3 that is a short job with the bike on a stand. It is also fully reversible, which is worth remembering if the bike is ever sold on to someone who wants it back on the road.

Specifications

  • Brand: JetPrime
  • Part number: JP SPK 015 (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: Yamaha R3 Mectronik (2019–2021)
  • Road approval: none — closed-circuit and race use only
FitmentWhich bikes this fits
  • Yamaha R3 (2019–2021)
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08 · Paddock

Before you go.

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