The Ohlins YA524 is a rear mono shock from the STX 46 Street range for the Yamaha TRX 850. It uses a gas-pressurised, oil/gas separated design to help maintain consistent damping during real-world street riding. Built around Ohlins damping architecture, it is intended to improve chassis control and tyre contact without changing the character of the bike.

Ohlins | Made to race, perfected to ride

Developed from Ohlins race program know-how and adapted for street use, this unit focuses on predictable damping response and stability through changing road surfaces. The aim is controlled movement rather than harshness, helping the bike stay composed when the pace picks up.

Who this shock is for

Suited to TRX 850 riders who want a more controlled rear end for spirited road riding and touring, especially when road conditions and loading vary. It is also a good match if your current shock feels inconsistent, vague mid-corner, or less supported under braking and acceleration transitions.

Shock design & features

This is an Ohlins STX 46 Street rear shock with gas pressurisation and separated oil/gas to reduce aeration and keep damping behaviour more stable. The internal layout is designed to deliver clear chassis feedback and maintain traction over bumps and surface changes.

Tuning controls

Adjustment is provided for rebound damping and compression damping, allowing you to balance support, comfort, and grip to suit your riding style and typical roads. These controls are intended for practical tuning changes rather than constant readjustment.

Before you install

Confirm fitment for your Yamaha TRX 850 and check overall condition of linkages, swingarm bearings, and mounting hardware before installing the new unit. Once fitted, set sag and then fine-tune damping in small steps so changes are easy to evaluate.

Serviceability/lifecycle

Like other Ohlins units, this shock is designed to be serviced to maintain performance over time. Periodic oil and seal service helps keep damping consistent and protects internal components, particularly if the bike sees regular wet-weather use or higher kilometre riding.