JetPrime JP ES 033 Yamaha — SLS/AIS Block-Off Cover for Yamaha YZF-R1/M (2010-2026) – JP ES 033 — Ansicht 1 360° — drag me
02 · Data & docs

The facts.

Technical data
ModelJP ES 033
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsYamaha R1 (2004–2025)
InstallationPlug-and-play, no wiring harness modifications required
Intended UseRace use only — not road legal
FunctionPermanently blocks the PAIR/SLS/AIS secondary air injection circuit
DescriptionThe whole story

The JP ES 033 blanks the PAIR ports on the R1's cylinder head, covering two decades of the model.

Key Features

  • Yamaha R1 (2004–2025)
  • Machined block-off cover for the PAIR ports
  • Sealed with its own gasket
  • Fully reversible to standard

Twenty-One Model Years

Yamaha kept the R1's secondary air arrangement consistent from 2004 through to the current track-only bike. A single cover spanning that is unusual and useful.

Closing the Galleries

The plate seals the passages that carry fresh air into the exhaust ports, which is what physically stops the system rather than merely disconnecting it.

Supplied Sealed

A dedicated gasket comes with the cover. Beside an exhaust port a hand-applied bead hardens and fails, usually at the least convenient moment.

Before and After the Crossplane

The fitment covers the flat-plane bikes up to 2008 and every crossplane R1 since. Yamaha changed the firing order and left the emissions plumbing alone.

Where the Popping Comes From

Fresh air meeting unburnt fuel in a hot header. Riders blame the exhaust and the exhaust is almost always innocent.

Machined, Not Pressed

A cut plate keeps its sealing face through the thermal cycling a cylinder head sees. Stamped covers distort and then leak.

Emissions Approval

Removing the system takes the motorcycle outside its type approval. That makes this a closed-circuit modification and the listing does not disguise it.

Mapping Without Interference

Oxygen injected downstream of combustion makes the sensor report a lean mixture that is not there. Any serious fuelling work begins with this removed.

Nothing Modified

The factory cover and gasket refit at any point. The head itself is untouched throughout.

Two Firing Orders, One Cover

The fitment spans the flat-plane bikes up to 2008 and every crossplane R1 since, which are very different motorcycles sharing a cylinder head layout. Yamaha changed the crankshaft and the character and left the emissions plumbing exactly where it was.

Fitment and Compatibility

  • Yamaha R1 (2004–2025)
  • Covers the R1 Gytr versions of this model

Specifications

Model JP ES 033
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Yamaha R1 (2004–2025)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x block-off plate
FitmentWhich bikes this fits
  • Yamaha R1 (2004–2025)
07 · Support

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08 · Paddock

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