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 SuperSport 950 (2021–2024)
InstallationPlug-and-play, no wiring harness modifications required
FitmentDucati Supersport 950 (2021–2024) / Ducati Supersport 950 S (2021–2024)
Road approvalNone — closed-circuit and race use only
DescriptionThe whole story

The JP ES 041 closes the secondary air ports in the SuperSport 950's cylinder head with a machined aluminium cover in place of the moulded reed housing Ducati fitted.

Key Features

  • Ducati SuperSport 950 (2021–2024)
  • 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

An Adjustable Screen

Moved by hand over a useful range, which on a motorcycle designed for real distance is one of the details that decides ownership.

Plastic on a Hot Casting

The housing endures the widest thermal swing on the motorcycle. Reeds crack with age rather than mileage, and a cracked reed passes gas the wrong way.

Fitted Cold

There is no reason to attempt this on a warm engine and every reason not to. Aluminium threads and hot castings are a poor combination.

Aluminium Against Aluminium

The cover seals on an O-ring rather than metal to metal, which allows repeated removal without damaging the head face. It is the correct answer.

What a Cracked Reed Does

It stops sealing in one direction, letting exhaust gas travel back towards the airbox. The residue coats the element and is usually found while looking for something else.

Popping on the Overrun

Fresh air arriving in a hot exhaust port meets unburnt fuel and lights it, which is where a good part of the crackle on a closed throttle comes from. Owners who delete the system are sometimes surprised that the motorcycle goes quieter rather than louder.

What Actually Improves

A tidier top end on an engine Ducati deliberately styles around, one fewer perishable component bolted to a cylinder head, and an exhaust port that cannot admit anything. No power, no throttle response and no consumption change, and nobody should buy this expecting otherwise.

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 SuperSport 950 (2021–2024)

Specifications

Model JP ES 041
Manufacturer JetPrime
Material CNC-milled Ergal 7075
Fits Ducati SuperSport 950 (2021–2024)
Installation Plug-and-play, no wiring harness modifications required
What's includedEverything in the box
  • 1x block-off plate
FitmentWhich bikes this fits
  • Ducati SuperSport 950 (2021–2024)
07 · Support

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08 · Paddock

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