The facts.
| Brand | K-Tech |
|---|---|
| Part number | GBS-018 |
| Inner diameter | 43.00 mm |
| Outer diameter | 46.00 mm |
| Height | 15.00 mm |
| Wall thickness | 1.50 mm |
| Material | Hardened steel with copper coating, PTFE-coated contact faces |
| Quantity | 2 (pair) |
| Fitment | Yamaha YZF-R1 M RN32 (2015–2016), RN49 (2017–2020), RN65 (2021–2026) |
DescriptionThe whole story▼
Engineered exclusively for the track-focused Yamaha YZF-R1 M — covering the RN32, RN49 and RN65 generations from 2015 to 2026 — the K-Tech GBS-018 fork slide bush kit is a precision-crafted upgrade that restores and elevates front-end feel. Manufactured to OEM dimensions from hardened steel with a copper coating and PTFE-treated contact surfaces, these bushes represent K-Tech's characteristic blend of exacting tolerances and long-service durability.
Key Features
- Hardened steel construction with copper coating resists wear and corrosion under sustained track and road use.
- PTFE-coated contact faces reduce friction to a minimum, sharpening fork response and improving small-bump sensitivity.
- Manufactured to exact OEM specifications — 43.00 mm inner diameter, 46.00 mm outer diameter — for a straightforward like-for-like fitment.
- Supplied as a matched pair so both fork legs are serviced simultaneously, maintaining balanced damping characteristics.
- Direct replacement for the factory slide bushes; no modification required.
Design, Finish and Heritage
K-Tech Suspension has built its reputation on components that meet the demands of professional racing whilst remaining accessible to serious road riders. The GBS-018 reflects that heritage precisely: the copper-wash finish is not merely aesthetic — it acts as a sacrificial anti-corrosion layer that protects the hardened steel substrate through thousands of kilometres of fork cycles. The PTFE treatment on the working surfaces is applied with the same process K-Tech uses across its full range of fork internals, ensuring consistent low-stiction performance from the first compression stroke.
At 1.50 mm wall thickness the bushes are dimensioned to maintain the critical clearance tolerances the YZF-R1 M's Öhlins Electronic Racing Suspension demands. Replacing worn slide bushes with correctly specified K-Tech items removes the lateral play that causes vague steering feel and accelerated seal wear — a detail that matters whether the bike is being lapped at a circuit or ridden hard on open roads.
Fitment and Compatibility
This kit is designed exclusively for the M-variant of the Yamaha YZF-R1. It is not suitable for the standard YZF-R1.
- Yamaha YZF-R1 M RN32 (2015–2016)
- Yamaha YZF-R1 M RN49 (2017–2020)
- Yamaha YZF-R1 M RN65 (2021–2026)
Installation Note
Correct installation requires specialist fork-disassembly tools and a working knowledge of inverted fork service procedures. K-Tech recommends that fitment is carried out by an authorised K-Tech Service Centre to ensure the bushes are seated correctly and fork alignment is maintained.
Specifications
| Part number | GBS-018 |
|---|---|
| Inner diameter | 43.00 mm |
| Outer diameter | 46.00 mm |
| Height | 15.00 mm |
| Wall thickness | 1.50 mm |
| Material | Hardened steel with copper coating |
| Surface treatment | PTFE-coated contact faces |
| Quantity supplied | 2 (pair) |
What's includedEverything in the box▼
- 2x K-Tech fork slide bushes (GBS-018)
FitmentWhich bikes this fits▼
- Yamaha YZF-R1 M RN32, RN49, RN65 (2015–2026)
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