⟲ 360° — drag meThe facts.
| Model | JP ES 660 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | Aprilia Tuono 660 (2021–2026) |
| Installation | Plug-and-play, no wiring harness modifications required |
| Fitment | Aprilia Tuono 660 (2021–2026) / Aprilia Tuono 660 Factory (2021–2026) / Aprilia Tuareg 660 (2021–2026) / Aprilia Tuareg 660 Rally (2025–2026) |
| Road approval | None — closed-circuit and race use only |
DescriptionThe whole story▼
The JP ES 660 caps the Tuono 660's secondary air port with a machined aluminium blank.
Key Features
- Aprilia Tuono 660 (2021–2026)
- Blanks the secondary air port in the head
- Machined from solid aluminium
- O-ring sealed, no jointing compound
- Original fastener positions
- Standard housing refits at any time
The Physical Half
A reed box on the cylinder head with a hose to the airbox. Silencing the solenoid electrically leaves all of it bolted in place.
Why It Matters on This Bike
With no fairing, the top of the engine is on display and the exhaust note reaches the rider directly. Both arguments point the same way.
O-Ring Sealed
A rubber ring in a machined groove rather than compound on a flat face. It comes apart cleanly whenever it needs to.
Ninety-Five Horsepower
Softened slightly from the RS 660 tune to suit the wide bars. On a road the Tuono is quicker than the faired bike more often than anyone admits.
A Real Pillion Seat
Unusually for the class, someone can sit on the back for an hour without complaining. Aprilia treated the Tuono as a road bike first.
Before a Remap
Unmetered air after combustion moves the lambda readings, and everything decided from those numbers is built on the error.
Original Fasteners
Aprilia's own bolt spacing and torque values. Nothing is drilled and the casting is untouched.
The Circuit Remains
Blanking the head does not stop the controller testing the solenoid. That fault needs the electrical eliminator.
Homologation
Removing emissions equipment ends road legality across Europe.
Reversible
The standard housing refits with nothing consumed in either direction.
Two Hundred and Seventy Degrees
The crank spacing gives the parallel twin an uneven beat and the traction feel of a V-twin, which is deliberate and is most of why the engine is likeable. It also means the exhaust note is unlike anything else in the class, fairing or no fairing.
Fitment and Compatibility
- Aprilia Tuono 660 (2021–2026)
Specifications
| Model | JP ES 660 |
|---|---|
| Manufacturer | JetPrime |
| Material | CNC-milled Ergal 7075 |
| Fits | Aprilia Tuono 660 (2021–2026) |
| Installation | Plug-and-play, no wiring harness modifications required |
What's includedEverything in the box▼
- 1x block-off plate
FitmentWhich bikes this fits▼
- Aprilia Tuono 660 (2021–2026)
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Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
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Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
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Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
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