Tubeless 21"
Wheel size: 21"
Valve type: straight, TR4
Tube thickness: approx. 4 mm

Bridgestone Battlecross X31 Motocross 120/80-19 TT Rear

Contents: 1 piece

Bridgestone Battlecross X40-R Motocross 120/80-19 TT Rear

Contents: 1 piece

Dimensions: 40.00 x 49.50 x 7.00/9.50 mm

Sales unit: 1 SET (2 PIECES)

Improved tolerances for enhanced damping performance
Improved adjustment range
Fully pre-assembled units simplify installation
Improved damping comfort and increased driving stability

The K-Tech 'Pro Valve' System is precision-engineered designed to elevate the performance of WP 48.00mm open cartridge forks. The 'Pro Valve' replaces the original compression and rebound damping assemblies, alongside the adjustment needles, to deliver superior damping characteristics and an extended adjustment range. This innovative upgrade optimises ride quality, enhances stability, and provides responsive feedback across varied terrain, making it the ideal choice for off-road riders looking to push their boundaries with increased control and comfort.

• Designed and manufactured with the highest precision to ensure consistent quality and durability
• Enhances energy efficiency by smoothing out rough terrain, keeping riders focused and comfortable longer
• Offers unmatched adaptability on uneven ground without compromising the essential support and handling riders rely on
• With tighter tolerances than OEM components, this kit ensures refined damping performance and reliability in demanding conditions
• Provides a broader scope of settings, allowing riders to fine-tune their suspension to perfectly match their preferences and riding environment
• Supplied as complete assemblies for straightforward, efficient fitment by professional K-Tech authorised dealers
• Promotes a stable, balanced ride that increases comfort and inspires confidence, especially on challenging surfaces
• Engineered to optimise pressure management over the OEM system, providing a smoother, more predictable response

The K-Tech 'Pro Valve' System are exclusively available through K-Tech authorised dealers. Installation by trained professionals is essential to ensure optimal performance and safety, as the kit requires specialised tools and techniques.

Adapter for opening the KYB triple adjuster

The K-Tech Off-Road Fork Work Station was designed for precision, organization, and efficiency, and is the ultimate service companion for suspension specialists and dedicated motorcycle enthusiasts. Designed to securely hold multiple fork components during disassembly and maintenance, this purpose-built work station keeps your workspace organized while allowing oil to drain safely from critical suspension parts.

The workstation was specifically designed for off-road forks to support inner and outer fork tubes, cartridges, shock rods, and shock assemblies during maintenance. Each component can be securely placed in its designated holders while excess fork oil drains away, preventing mess and improving workflow efficiency. Since all parts are stored upright and organized in a single compact station, technicians gain more usable workspace and better visibility, which helps streamline complex suspension maintenance tasks.

• Key Benefits

  • Secure Storage of Components—Safely stores fork tubes, cartridges, piston rods, and damping assemblies during maintenance.
  • Better Organization in the Workshop—Keeps suspension parts organized and easily accessible.
  • Oil Drain Management—Allows fork components to drain naturally while being held in place.
  • Space-saving design—Saves valuable bench space during suspension overhauls.
  • Precision tool for the workshop—Ideal for suspension technicians, racing teams, and ambitious mechanics.

Upgrade your KYB shock absorber with the new K-Tech Compression Adjuster

The K-Tech Pro Valve Kit replaces the original shock valve with a performance-optimized system featuring tuned shim stacks. It noticeably improves traction, control, and ride comfort, and delivers a responsive yet stable ride—ideal for demanding off-road conditions.

To remove the piston rod on WP shock absorbers (lock nut at the base)

To remove the piston rod from WP shock absorbers (lock nut at the base)

S-TECH Basevalve Compression for KYB Forks

• Made of steel
• More durable than OEM
• Compatible with all KYB 48mm forks (closed cartridge)

S-TECH Base Valve for KYB forks.

• Made of steel
• More durable than OEM