JetPrime JP ES 033 Yamaha YZF-R1 Race — PAIR system eliminator cover — view 1 360° — drag me
02 · Data & docs

The facts.

Technical data
ModelJP ES 033
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsYamaha YZF-R1 Race (2025–2025)
InstallationPlug-and-play, no wiring harness modifications required
DescriptionThe whole story

The JP ES 033 blanks the PAIR ports on the track-only R1 Race.

Key Features

  • Yamaha YZF-R1 Race (2025)
  • Machined block-off cover for the PAIR ports
  • Sealed with its own gasket
  • Fully reversible to standard

Emissions Hardware on a Track Bike

The system survives on the Race version because the engine carries it from homologation. On a motorcycle that cannot be registered it serves no purpose at all.

The Mechanical Half

The solenoid eliminator silences the fault. This plate closes the passages, which is what actually stops air reaching the exhaust ports.

A Gasket, Included

The location is hot and improvised sealing fails there. The correct gasket comes with the cover rather than being an extra line on an order.

No Road Registration

Yamaha withdrew the R1 from road sale in Europe and continued it as a closed-circuit machine, delivered without lights or mirrors.

The Crossplane Four

Yamaha's uneven firing order came from the M1 and remains the defining characteristic of the engine. Nothing else in the class behaves like it.

Cut From Solid

Machined aluminium stays flat where pressed metal distorts. On a sealing surface bolted to a cylinder head, nothing else is worth discussing.

Before the Race Map

Injected oxygen makes the lambda sensor report a mixture that does not exist. On a bike destined for a dyno that is the first thing to eliminate.

A Single Model Year

This fitment covers 2025. Yamaha's track-only programme changes specification between seasons and the year matters accordingly.

Reversible

The original cover and gasket refit whenever needed, though on a Race machine that is unlikely ever to be required.

Kept Alive for the Rulebooks

Yamaha continues building the R1 for competition classes that require a production base, long after it stopped being registrable in Europe. It is a strange position for a manufacturer and it is the only reason a track-only version exists.

Fitment and Compatibility

  • Yamaha YZF-R1 Race (2025–2025)

Specifications

Model JP ES 033
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Yamaha YZF-R1 Race (2025–2025)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x block-off plate
FitmentWhich bikes this fits
  • Yamaha YZF-R1 Race (2025)
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