K-Tech Fork Slide Bush Kit Yamaha YZF-R3 (2019–2026) GBS-003
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Keeping your Yamaha YZF-R3's forks smooth and precise through everyday commutes and weekend rides starts with the right slide bushes. The K-Tech GBS-003 fork slide bush kit is a direct, exact-fit replacement for the YZF-R3 (2019–2026), manufactured from hardened steel with copper and PTFE coatings that dramatically reduce friction, resist corrosion, and restore the fork's original responsive feel — all at a price that makes proper maintenance straightforward.
Key Features
- Exact fitment for the Yamaha YZF-R3 (2019–2026) — no modification required
- Hardened steel construction with copper underlayer for strength and corrosion resistance
- PTFE-coated contact surfaces minimise friction and deliver a smoother, more consistent fork action
- Protects against premature wear on both the bush and fork tube
- Supplied as a complete two-piece set covering both fork legs in a single purchase
Why Replacing Fork Slide Bushes Matters
Worn fork slide bushes are one of the most common and most overlooked causes of vague, notchy front-end feel. As the bushes degrade, the fork internals develop play, leading to imprecise steering feedback and uneven damping response. For a rider using the YZF-R3 day to day, fresh K-Tech GBS-003 bushes restore the light, linear fork action the bike was designed to deliver — a noticeable improvement on every road.
Construction and Materials
K-Tech manufactures the GBS-003 from hardened steel with a copper intermediate coating that bonds the PTFE surface layer securely and provides a secondary barrier against moisture ingress. The PTFE face is the key to the kit's low-friction performance: it allows the fork slider to move with minimal resistance under load, reducing the stiction that causes the front end to feel wooden or abrupt over small bumps. The result is a fork that tracks more faithfully on uneven surfaces and responds more immediately to rider inputs.
Fitment and Compatibility
These bushes are designed exclusively for the following model:
- Yamaha YZF-R3 — model years 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
They are not compatible with any other Yamaha model or year range. Installation should be carried out by an authorised K-Tech service centre using the appropriate specialist tools, ensuring the bushes are seated correctly and the fork assembly is returned to its full working specification.
Specifications
| Parameter | Value |
|---|---|
| Inner diameter | 37.00 mm |
| Outer diameter | 41.00 mm |
| Height | 12.00 mm |
| Wall thickness | 2.00 mm |
| Material | Hardened steel with copper and PTFE coating |
| Quantity | 2 bushes (complete set) |
| Part number | GBS-003 |
| Fitment | Yamaha YZF-R3 (2019–2026) |
| Brand | K-Tech |
|---|---|
| Part number | GBS-003 |
| Fitment | Yamaha YZF-R3 (2019–2026) |
| Inner diameter | 37.00 mm |
| Outer diameter | 41.00 mm |
| Height | 12.00 mm |
| Wall thickness | 2.00 mm |
| Material | Hardened steel with copper and PTFE coating |
| Quantity | 2 fork slide bushes |
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2x K-Tech fork slide bushes
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// K-Tech
K-Tech Fork Slide Bush Kit Yamaha YZF-R3 (2019–2026) GBS-003

Tech specs
- Brand
- K-Tech
- Part number
- GBS-003
- Fitment
- Yamaha YZF-R3 (2019–2026)
- Inner diameter
- 37.00 mm
- Outer diameter
- 41.00 mm
- Height
- 12.00 mm
- Wall thickness
- 2.00 mm
- Material
- Hardened steel with copper and PTFE coating
- Quantity
- 2 fork slide bushes
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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