The facts.
| Brand | K-Tech |
|---|---|
| Part Number | GBS-007 |
| Fitment | Kawasaki Ninja 400 (2018–2023) |
| Component | Fork guide bushings |
| Inner Diameter | 41.00 mm |
| Outer Diameter | 45.00 mm |
| Height | 15.00 mm |
| Wall Thickness | 2.00 mm |
| Material | Hardened steel with copper coating and PTFE-coated contact surfaces |
DescriptionThe whole story▼
Precise fork action is the foundation of fast, consistent lap times, and the K-Tech GBS-007 slide bushing kit delivers exactly that for the Kawasaki Ninja 400 (2018–2023). Replacing the factory fork guide bushings with these hardened-steel, copper and PTFE-coated units eliminates the slop and stiction that blunt feedback on track, restoring the sharp, progressive response that makes the difference between a hesitant entry and a committed one.
Key Features
- Direct OEM replacement for fork guide bushings on the Kawasaki Ninja 400 (2018–2023) — no modification required
- Hardened steel construction with a copper coating for outstanding wear resistance under sustained track use
- PTFE-coated contact surfaces reduce friction to a minimum, giving the fork a smooth, consistent stroke lap after lap
- Complete kit: two bushings supplied to allow a full axle-to-axle service in one go
- Inner diameter 41.00 mm / outer diameter 45.00 mm / height 15.00 mm / wall thickness 2.00 mm — precision-machined to K-Tech tolerances
Performance on Track
The Ninja 400 has earned a strong reputation in junior and single-make racing classes, where suspension consistency separates podium finishers from mid-pack results. Worn or low-quality fork bushings introduce play into the slider-outer tube interface, generating a vague, deflective feel through fast chicanes and late braking zones. The GBS-007 kit closes that tolerance gap with its layered construction: a hardened steel core provides the structural rigidity to handle repeated heavy-braking loads, the copper interlayer distributes stress evenly, and the PTFE surface coating allows the fork legs to move with minimal breakaway friction. The result is a fork that responds immediately to input rather than lagging behind the rider's commands.
Build Quality & Longevity
K-Tech's fork bushings are manufactured to the same standard as the components found in the brand's competition suspension products. The tri-layer material stack — steel, copper, PTFE — is the industry-accepted approach for high-cycle fork bushings because each layer serves a distinct function. Steel carries the load, copper absorbs micro-vibrations and prevents fretting corrosion, while PTFE keeps the sliding surface dry and clean without relying on fork oil for lubrication. This translates to a longer service life compared to plain OEM-style bushings, particularly in the abrasive conditions of track days and racing circuits.
Fitment & Compatibility
The GBS-007 kit is designed exclusively for the Kawasaki Ninja 400 covering model years 2018 through 2023. It is not compatible with other Kawasaki models. Installation requires specialist fork tooling and a working knowledge of telescopic fork assembly; K-Tech recommends fitting by an authorised K-Tech Service Centre to ensure correct seating and safe operation.
Specifications
- Inner diameter: 41.00 mm
- Outer diameter: 45.00 mm
- Height: 15.00 mm
- Wall thickness: 2.00 mm
- Material: hardened steel with copper coating and PTFE-coated contact surfaces
- Part number: GBS-007
- Contents: 2 fork guide bushings
What's includedEverything in the box▼
- 2x K-Tech fork guide bushings
FitmentWhich bikes this fits▼
- Kawasaki Ninja 400 (2018–2023)
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