IMA Special Parts STK Racing Top Clamp for Yamaha YZF-R1/M RN32 RN49 RN65 (2015–2026)

Machined from aerospace-grade 7075 Ergal aluminium and engineered using Finite Element Method (FEM) analysis, the IMA Special Parts STK Racing top clamp delivers a level of structural integrity and precision that serious Yamaha YZF-R1 and R1M pilots demand — whether they are chasing lap records or building an uncompromising road weapon.

Key Features

• FEM-calculated construction ensures optimal load distribution, reducing flex under hard braking and aggressive cornering for measurably better vehicle control.
• 7075 Ergal aluminium throughout — one of the highest-strength aluminium alloys available, combining ultra-low weight with exceptional resistance to fatigue and impact.
• Adjustable offset from 24 mm to 32 mm lets you dial in the front-end geometry to suit your riding style, circuit layout or tyre choice.
• Titanium fasteners fitted as standard, keeping overall assembly weight to a minimum without sacrificing clamping force or long-term reliability.
• Engineered specifically for the Yamaha YZF-R1 and R1M (RN32, RN49, RN65), ensuring a direct, no-modification fit with correct fork tube centres and stem dimensions.
• Improved braking stability and front-wheel feedback give the rider the confidence to brake later and carry more corner speed.

Built to a Higher Standard

The choice of 7075 Ergal aluminium is the first indicator that IMA Special Parts are not cutting corners. Where many aftermarket components rely on the more common 6061 alloy, 7075 Ergal offers significantly higher tensile strength, making it the preferred material for aerospace structures and high-end motorsport components alike. The billet is CNC-machined to tight tolerances so that every bore, thread and clamping face meets the geometry demands of the YZF-R1 platform precisely.

FEM analysis takes the guesswork out of wall thicknesses and structural ribs. Each section of the clamp is modelled under real-world load scenarios — hard trail braking, kerb strikes, sustained lateral forces — so material is placed exactly where it is needed and removed everywhere it is not. The result is a component that is simultaneously lighter and stiffer than a comparable cast or conventionally designed part.

Geometry You Can Tune

The adjustable offset range of 24 mm to 32 mm gives riders meaningful control over front-end feel. A shorter offset sharpens turn-in and suits technical, high-speed circuits; a longer offset softens steering effort and improves high-speed stability for fast flowing tracks or road use. Combined with the inherent rigidity of the 7075 Ergal structure, each offset position delivers consistent, predictable feedback rather than the vague, elastic feeling that can come from a flexing OEM clamp under race conditions.

Titanium fasteners complete the package. Lighter than steel and far more corrosion-resistant, they maintain clamping torque over time and resist the vibration-induced loosening that steel hardware can suffer on track.

Fitment and Compatibility

The IMA Special Parts STK Racing top clamp is a direct-fit replacement for the following motorcycles:

• Yamaha YZF-R1 RN32 (2015–2017)
• Yamaha YZF-R1M RN32 (2015–2017)
• Yamaha YZF-R1 RN49 (2018–2022)
• Yamaha YZF-R1M RN49 (2018–2022)
• Yamaha YZF-R1 RN65 (2023–2026)
• Yamaha YZF-R1M RN65 (2023–2026)

Specifications

• Material: 7075 Ergal aluminium
• Design method: FEM (Finite Element Method) calculated
• Offset: Adjustable 24 mm to 32 mm
• Fasteners: Titanium
• Fitment: Yamaha YZF-R1/M RN32, RN49, RN65 (2015–2026)
• Available finishes: black, titanium, aluminium