JetPrime JP ES 041 Ducati — SLS/AIS Block-Off Plate — view 1 360° — drag me
02 · Data & docs

The facts.

Technical data
ModelJP ES 041
ManufacturerJetPrime
MaterialCNC-milled Ergal 7075
FitsDucati Monster 937 (2021–2025)
InstallationPlug-and-play, no wiring harness modifications required
FitmentDucati Monster 937 (2021–2025) / Ducati Monster 937 Plus (2021–2025) / Ducati Monster 937 SP (2021–2025)
Road approvalNone — closed-circuit and race use only
DescriptionThe whole story

The JP ES 041 takes the reed valve assembly off the Monster 937's cylinder head and closes the opening properly rather than leaving a capped hose in its place.

Key Features

  • Ducati Monster 937 (2021–2025)
  • Blanks the secondary air ports in the cylinder head
  • Machined from solid aluminium
  • O-ring sealed, no jointing compound
  • Original fastener positions
  • Standard housing refits at any time

Cornering ABS as Standard

The full electronics package on a middleweight naked, which Ducati now fits across the range rather than reserving for the expensive models.

Original Fastener Positions

Ducati's own bolt spacing and torque figures. Nothing is drilled and no thread in the head is cut or disturbed by the exchange.

Not an Engine Job

Nothing is opened, drained or internally disturbed. It is an external component on an external face and the work reflects that.

No Change to Cooling

The housing sits on an external face and carries no coolant. Removing it affects nothing thermal about the cylinder head at all.

Not the Electrical Fault

The dashboard warning comes from the solenoid circuit and nothing else. Fitting the cover alone leaves the lamp exactly where it was.

What Is Actually Gained

One fewer perishable component, a tidier engine and a port that cannot admit anything. No power, no response and no consumption change.

A Repair Wearing Another Name

On any Ducati past its first decade the reed housing has limited working life left. Fitting aluminium removes a job that was coming rather than merely deleting an emissions device, which is why the argument is strongest on older machines and weakest on new ones.

A Second-Hand Ducati With Plastic Housings

On a machine of ten years or more the housings are original unless somebody has already been in there, and their condition is a fair guide to how the motorcycle was stored. A housing that has gone chalky has been through more heat cycles than the odometer suggests.

Fitment and Compatibility

  • Ducati Monster 937 (2021–2025)
  • Covers the Monster 937 Plus versions of this model

Specifications

Model JP ES 041
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Ducati Monster 937 (2021–2025)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x block-off plate
FitmentWhich bikes this fits
  • Ducati Monster 937 (2021–2025)
07 · Support

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