Gilles FCAP fuel cap for Kawasaki NINJA 650
02 · Data & docs

The facts.

Technical data
BrandGilles Tooling
SeriesFCAP
Part numberFCAP-04-B
TypeFuel filler cap, keyless
ConstructionCNC-milled, two-part
FinishTwo-colour anodised
OperationWith the FCAP-TOOL-01-B (sold separately)
FitmentKawasaki NINJA 650 (2026)
Road approvalNot required (Gilles)
DescriptionThe whole story▼

The Ninja 650 has been Kawasaki's middleweight twin-cylinder sports bike for many years, and for the 2026 model Gilles lists the FCAP-04-B. The cap replaces the lockable standard filler with a keyless, CNC-milled cap that opens with the FCAP tool.

Key Features

  • Opened and closed with the FCAP-TOOL-01-B, sold separately
  • Keyless operation
  • Low weight
  • Designed with experience from MotoGP and WorldSBK, according to Gilles
  • CNC-milled, two-colour anodised
  • No registration required, according to Gilles

Type EX650S

Gilles names only the 2026 bike of type EX650S; earlier Ninja 650s are not in the list for this cap.

Road Approval

No registration required, says Gilles: the FCAP goes on the Kawasaki NINJA 650 without an inspection and without any change to the vehicle documents.

Scope of Delivery

One FCAP fuel cap (FCAP-04-B) in black and titanium colour. Please order the FCAP-TOOL-01-B as well if you do not have one yet: without it the cap can be neither opened nor closed. The tool fits every Gilles FCAP cap, and the original cap can be kept for later.

Fitting

Remove the original cap, clean the sealing surface on the tank and fit the FCAP according to the Gilles instructions, tightening the screws evenly. Work with a low fuel level and keep the opening covered while it is exposed. Then test opening and closing with the tool several times before the first refuel, and check the cap again after the first full tank.

Specifications

  • Brand: Gilles Tooling
  • Series: FCAP
  • Part number: FCAP-04-B
  • Type: Fuel filler cap, keyless
  • Construction: CNC-milled, two-part
  • Finish: Two-colour anodised
  • Operation: With the FCAP-TOOL-01-B (sold separately)
  • Fitment: Kawasaki NINJA 650 (2026)
  • Road approval: Not required (Gilles)
What's includedEverything in the box▼
  • 1x Gilles FCAP fuel cap FCAP-04-B (tool sold separately)
FitmentWhich bikes this fits▼
  • Kawasaki NINJA 650 (2026)
07 · Support

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