FSR-48 Complete Racing Front Fork for WP Xplor – Sphere 3.0

The Dal Soggio 1P.FSR-48 XPLOR 3.0 FSR-48 Complete Front Fork is a high-performance suspension system developed specifically for motorcycles equipped with the WP Xplor fork platform.

Rather than functioning as a simple internal upgrade, the FSR-48 is a complete front fork assembly designed and manufactured in Italy using premium materials, advanced surface treatments, precision machining, and Dal Soggio’s Sphere 3.0 hydraulic closed-cartridge technology.

The outer fork tubes are manufactured from ERGAL 7075 T6 aluminum alloy and feature extensive internal machining intended to promote smoother suspension movement and reduce internal friction.

The inner tubes combine an external DLC coating with internal hard anodizing, providing a low-friction sliding surface together with improved surface hardness and wear resistance.

At the core of the fork is the Dal Soggio Sphere 3.0 hydraulic closed cartridge, which replaces the original WP Xplor internal damping architecture with a sealed cartridge system designed to improve damping precision, sensitivity, and consistency across changing terrain. Dal Soggio specifically positions the Sphere system as a major upgrade for WP Xplor applications.

The fork is equipped with premium SKF seals, while the axle lugs are manufactured from ERGAL 7075 T6 and completely CNC machined from solid material for precise geometry and structural consistency.

Dal Soggio lists spring rates from 4.4 N/mm to 5.2 N/mm for the FSR-48 platform and specifies Cube 5W suspension oil inside the fork.

Key Features

• Complete FSR-48 racing front fork developed specifically for WP Xplor applications
• Sphere 3.0 hydraulic closed-cartridge system provides precise and consistent damping control
• ERGAL 7075 T6 outer tubes feature extensive internal machining for smooth suspension movement
• Inner tubes combine external DLC coating with internal hard anodizing for reduced friction and increased durability
• CNC-machined ERGAL 7075 T6 axle lugs and premium SKF seals complete the high-specification construction

Application & Compatibility

• WP Xplor fork platform

Dal Soggio confirms the FSR-48 as available for WP Xplor applications and specifically lists this SKU as the WP Xplor 3.0 version.

Exact motorcycle model and model-year compatibility should be verified before ordering because the official product page identifies the fork by suspension platform rather than publishing a complete motorcycle fitment list.

Suspension Technology

Sphere 3.0 Closed Cartridge

The FSR-48 uses Dal Soggio’s Sphere 3.0 hydraulic closed-cartridge system.

Compared with the original WP Xplor architecture, the Sphere system replaces the internal damping structure with a sealed and pressurized cartridge designed to improve damping precision, sensitivity, and rider feedback.

ERGAL 7075 T6 Construction

Dal Soggio uses ERGAL 7075 T6 extensively throughout the FSR-48.

The outer fork tubes are internally machined, while the axle lugs are CNC machined completely from solid ERGAL 7075 T6 material.

DLC & Hard-Anodized Inner Tubes

The inner tubes feature:

• DLC coating on the external sliding surface
• Hard anodizing on the internal surface

These treatments are intended to improve sliding behavior, reduce friction, and increase surface durability.

Spring & Setup Information

Dal Soggio lists spring rates from 4.4 N/mm through 5.2 N/mm for the FSR-48 platform. Final spring selection should be matched to rider weight, riding discipline, motorcycle setup, and terrain.

Service Fluid

Dal Soggio specifies Cube 5W suspension oil for the FSR-48 front fork.

Installation & Setup Note

The 1P.FSR-48 XPLOR 3.0 is a complete front fork assembly developed for the WP Xplor platform.

Before installation, verify:

• motorcycle application,
• axle and brake interface,
• fork clamp compatibility,
• spring rate,
• damping setup,
• fork height and chassis balance.

Dal Soggio recommends installation and setup by a suspension specialist to ensure correct fitment and safe operation.

This SKU is the dedicated WP Xplor version of the FSR-48 and should not be confused with the WP Xact MX, WP Xact EN, Beta, or Yamaha configurations, which use different part numbers.