MU456 Reservoir Shock

Elite Track and Street Precision: YSS MU456 Bottom Piggyback Mono Shock

Ready to experience true world-championship-level racing technology on the street or track? The YSS MU456 Series represents the absolute apex of the YSS Mono Line, crafted for high-performance sport bikes, hyper-nakeds, and race-ready machines. Positioned as a full-spec, ultra-premium upgrade, the MU456 features a visually stunning all-billet aluminum body and a unique bottom-mounted piggyback reservoir engineered for maximum thermal efficiency and space savings.

By positioning the high-pressure nitrogen reservoir at the bottom of the shock body, the MU456 drastically increases oil capacity and cooling efficiency, successfully wiping out oil cavitation and performance fade. With a massive 45mm piston and a bulletproof 16mm shaft, this rear shock delivers unrivaled chassis stability, razor-sharp turn-in, and relentless rear-wheel traction during aggressive cornering or high-speed track stints.

Why Step Up to the YSS MU456?

• Advanced High & Low Speed Compression: Take total control over your chassis behavior. Higher-end variants offer independent 30-way adjusters for both high-speed and low-speed compression damping, allowing you to seamlessly isolate aggressive bump-striking and track ripples from low-speed cornering and braking forces.
• Precision Rebound Adjustability: Features 30 distinct clicks of extension damping adjustment. Fine-tune your rear wheel recovery speed to eliminate mid-corner squirming and keep the chassis completely stable over successive, high-frequency ripples.
• All-Billet Technical Aesthetics: CNC-machined entirely from premium aircraft-grade billet aluminum, giving it an aggressive, precision-engineered look while saving significant weight over heavy cast OEM components.
• Oversized Big-Body Architecture: The ultra-rigid 45mm high-flow piston moves a substantial volume of oil per millimeter of stroke for instantaneous, ultra-plush feedback, while the 16mm hardened spindle shaft resists flexing under extreme track loads.
• Flexible Preload and Length Options: Adjust rider sag using either the lightweight threaded lock-ring or an available remote Hydraulic Preload Adjuster (HPA). Features an integrated length adjuster (up to +10mm) to optimize the bike’s steering geometry and swingarm angle.
• Zero-Bind Bearing Mounts: Equipped with highest-quality rod-end bearings with oil-less metal housing sliding surfaces as standard equipment to eliminate stiction and friction.

Technical Specifications

• Shock Type: High-Performance Monoshock with Bottom Bladder Piggyback Reservoir
• Piston Diameter: 45 mm
• Shaft Diameter: 16 mm
• Reservoir Design: Integrated Bottom Piggyback Nitrogen Gas Chamber
• Adjustability: 30-Click Rebound Damping, 30-Way Dual High/Low-Speed Compression Damping, Threaded Preload (Optional Hydraulic Preload Adjuster), and Ride Height/Length Adjustment (Max +10mm).
• Serviceability: 100% Fully rebuildable, serviceable, and valve-tunable for custom racing setups

Compatible vehicles:

• 2004-2007 HONDA CBF 600 SA