JetPrime JP ES 044 Kawasaki — SLS/AIS Block-Off Plate — view 1 360° — drag me
02 · Data & docs

The facts.

Technical data
ModelJP ES 044
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsKawasaki Z800 (2013–2016)
InstallationPlug-and-play, no wiring harness modifications required
FitmentKawasaki Z800 (2013–2016)
Road approvalNone — closed-circuit and race use only
DescriptionThe whole story

The JP ES 044 shuts the Z800's Clean Air System port permanently with a machined aluminium plate.

Key Features

  • Kawasaki Z800 (2013–2016)
  • 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

Replaced by the Z900

Kawasaki moved to a larger, lighter motorcycle in 2017. The Z800 has become an unusually good used purchase as a result.

Four Cylinders at the Price

Almost nothing else in the class offered them, and the smoothness and the noise are the whole reason owners chose one.

Not the Electrical Half

The controller monitors its solenoid regardless of what is bolted to the head, so the circuit still needs its own eliminator to keep the panel clear.

Why Improvised Blanks Fail

A bolt and washer or a smear of epoxy holds for a while. Neither survives a season of heat cycling, and the epoxy has to be chiselled off a cylinder head afterwards.

Twenty Minutes Once Exposed

The work itself is short. Everything else in the job is getting the tank and airbox out of the way.

The Complete Mechanical Picture

Follow it from the intake: a spigot on the airbox, a pipe, a valve box, then two drillings in the head. The cover shuts the far end for good, and whoever does that has to shut the near end too, because an open spigot feeding an engine unfiltered air is a considerably worse outcome than anything the system was doing.

The Case Against Improvising

A bolt and washer, a rubber bung or a smear of epoxy will all hold for a while. None survives a season of heat cycling and the epoxy has to be chiselled off.

Heat, Not Distance

A garage queen's reeds age at the same rate as a courier's, because it is the warm-up cycles rather than the kilometres that finish them.

Heavy for the Class

At 231 kilograms the Z800 was never light, and the engine made up for a great deal of it. Owners who care about the weight tend to work through a list of removals, and this is on it.

Fitment and Compatibility

  • Kawasaki Z800 (2013–2016)

Specifications

Model JP ES 044
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Kawasaki Z800 (2013–2016)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x block-off plate
FitmentWhich bikes this fits
  • Kawasaki Z800 (2013–2016)
07 · Support

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08 · Paddock

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