Bonamici Racing PSY4 Upper Fork Triple Clamp for Yamaha YZF-R9 (2025-2026)

Machined from a single billet of aeronautical-grade aluminium and finished to exacting Italian racing standards, the Bonamici Racing PSY4 upper triple clamp transforms the front-end character of the Yamaha YZF-R9 — delivering a level of steering precision and structural rigidity that the standard clamp simply cannot match.

Key Features

• CNC-machined from a single block of high-strength aeronautical aluminium for exceptional rigidity and dimensional accuracy throughout
• Hard-anodised surface treatment provides superior resistance to corrosion, mechanical abrasion, and the elements compared with painted or untreated alternatives
• Weighing approximately 0.345 kg (0.761 lbs), it is noticeably lighter than many OEM upper clamps, reducing unsprung mass for more sensitive suspension response
• Eliminates flex and play in the fork crown, translating directly into sharper turn-in and more confident feedback through the front wheel
• Supplied with high-quality fasteners, including titanium bolts, as befitting a premium Italian racing component
• Equally at home on road and track — a genuine performance upgrade for spirited riding and track day use alike

Build Quality and Materials

Bonamici Racing's reputation in the paddock rests on the quality of its Italian-manufactured CNC components, and the PSY4 is a clear example of that philosophy. The triple clamp is carved from a single piece of aeronautical aluminium — a grade chosen for its exceptional strength-to-weight ratio — rather than cast or pressed from lesser material. Every surface is then hard-anodised, creating a finish that is not merely cosmetic but structurally protective, sealing the aluminium against moisture ingress, track grime, and the micro-corrosion that degrades lesser parts over time. The included titanium fasteners extend that commitment to quality right through to the hardware.

Performance and Handling

The primary purpose of an aftermarket upper triple clamp is to eliminate the small but consequential amounts of flex inherent in a mass-produced OEM part. On the YZF-R9, the PSY4 creates a stiffer, more direct connection between the fork legs and the frame, which riders will notice immediately in fast direction changes and when carrying speed into corners. At track pace — where brake-diving forces and lateral loads are at their highest — the reduction in flex produces cleaner, more consistent front-end feel and greater confidence under hard braking. On the road, the same qualities translate to a more planted, communicative ride without harshness.

Fitment and Compatibility

The Bonamici Racing PSY4 is designed as a direct plug-in replacement for the Yamaha YZF-R9 upper triple clamp. No fork modification, additional machining, or fabrication is required. Installation uses the existing standard mounting points and can be completed in a few straightforward steps. Available in black anodised or silver anodised finish to suit your build aesthetic.

• Yamaha YZF-R9 — model years 2025 and 2026

Specifications