K-Tech RAZOR-R HPA shock absorber for Yamaha YZF-R7 2021–2026 360° — drag me
02 · Data & docs

The facts.

Technical data
BrandK-Tech
ModelRAZOR-R HPA
FitmentYamaha YZF-R7 (2021–2026)
Spring series46-140
Overall length310.00 mm
Gas pressure10.00 bar (N2)
Compression adjustment10 clicks
Rebound adjustment10 clicks
Part numbers280S-021-270-029 / 030 / 031 / 032
DescriptionThe whole story

When lap times matter and corner confidence is everything, the K-Tech RAZOR-R HPA shock absorber transforms the Yamaha YZF-R7 (2021–2026) from a capable middleweight into a genuinely track-ready weapon. Engineered to deliver measurably superior damping performance over the stock unit, this is the upgrade that serious YZF-R7 riders — from circuit regulars to weekend trackday enthusiasts — reach for first.

Key Features

  • 10-click adjustable compression damping for precise tuning across varying track surfaces and riding styles
  • 10-click adjustable rebound damping for optimal control through fast direction changes and chicanes
  • Adjustable spring preload to dial in ride height and balance for your exact weight and setup
  • Length adjustment for fine-tuning chassis geometry and improving stability under hard braking
  • Nitrogen (N2) gas charge at 10.00 bar eliminates foaming and ensures consistent damping performance, lap after lap
  • 46-140 series spring, available in four rider-weight-specific rates for optimised traction and rear-end stability
  • Direct OEM replacement fitment — no modifications required for installation

Race-Derived Performance

The RAZOR-R HPA is K-Tech's high-performance answer to the YZF-R7's stock suspension limitations. The piggyback reservoir design houses the RCPU (Remote Compression and Preload Unit) with a 35.00 mm housing diameter and 14.00 mm rod, delivering a level of tunability and damping precision that the factory shock simply cannot match. Whether you are chasing a personal best on a technical circuit or looking for more confidence mid-corner on a fast road, the nitrogen-charged internals remain consistent across the full temperature range — no fade, no guess work.

The 10-click compression and 10-click rebound adjusters allow a methodical, repeatable setup process. Each detent is clearly defined, so changes between sessions are easy to track and reverse. Paired with the adjustable preload, riders can transform the R7's handling character without specialist tools at trackside.

Spring Selection by Rider Weight

K-Tech offers the RAZOR-R HPA in four rider-weight-matched variants to ensure the 46-140 series spring operates within its optimal range from the outset. Select the appropriate part number at checkout:

  • 280S-021-270-029 — 65–80 kg rider weight
  • 280S-021-270-030 — 80–95 kg rider weight
  • 280S-021-270-031 — 95–110 kg rider weight
  • 280S-021-270-032 — 110–125 kg rider weight

Fitment & Compatibility

  • Yamaha YZF-R7 — model years 2021, 2022, 2023, 2024, 2025, 2026

Direct OEM replacement. Upper mount: eye type, 30.00 mm width, 10.00 mm bolt diameter. Lower mount: fork type, 25.00 mm width, 10.00 mm bolt diameter.

Installation Note

Installation must be carried out exclusively by an authorised K-Tech Service Centre. Specialist tools and techniques are required to ensure full performance and safety. Do not attempt self-installation.

Specifications

Specification Value
Spring series 46-140
Overall length 310.00 mm
Length tolerance -0 mm / +10 mm
Gas pressure 10.00 bar (N2)
Compression clicks 10
Rebound clicks 10
RCPU housing diameter 35.00 mm
RCPU rod diameter 14.00 mm
Upper mount Eye, 30.00 mm width, 10.00 mm bolt diameter
Lower mount Fork, 25.00 mm width, 10.00 mm bolt diameter
What's includedEverything in the box
  • 1x K-Tech RAZOR-R HPA shock absorber for Yamaha YZF-R7 (2021–2026)
  • Mounting hardware for quick and secure installation
FitmentWhich bikes this fits
  • Yamaha YZF-R7 (2021–2026)
07 · Support

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