Motorcycle HLSC and HLSRC Valves

Dual-flow motorcycle valves developed for extreme off-road conditions

Technology patented by ND Tuned, which allows you to adjust more effectively the shock absorbers and suspensions to Off-Road conditions

The low-speed orifices have a reduced oil flow capacity for slow circulation. When the maximum flow capacity is reached, it also passes through the high-speed orifices. This feature allows obtaining differential between low speed and high speed of compression adapted to the needs of each pilot.


HLSC Valves for forks


  • 28/6 HLSC valve kit

    ND-074-015

    Universal valves for suspension
    Adaptable to various diameters with the 35 and 34 converter

    Includes:
    2 x HLSC 28/6 ND Tuned valves
    1 x Compression shim stack kit

  • 4C HLSC valve kit

    ND-074-017

    For WP 4CS forks

    Includes:
    2 x HLSC 4C ND Tuned valves
    1 x Compression shim stack kit

  • Conversion adapter 28-35mm

    ND-074-014

    Converter for HLSC 28-35mm valves
    Showa / Kayaba forks
    Other sizes on request


HLSRC Valves for rear shocks


  • 46/12 HLSRC valve kit

    ND-074-032

    Includes:
    1 x HLSRC 46/12 ND Tuned valves
    1 x Compression and rebound shim stack kit
    1 x o-ring
    1 x piston ring

  • 50/12 HLSRC valve kit

    ND-074-030

    Includes:
    1 x HLSRC 50/12 ND Tuned valves
    1 x Compression and rebound shim stack kit
    1 x o-ring
    1 x piston ring

  • 50/16 HLSRC valve kit

    ND-074-031

    Includes:
    1 x HLSRC 50/16 ND Tuned valves
    1 x Compression and rebound shim stack kit
    1 x o-ring
    1 x piston ring

  • 20/6 HLSRC valve kit

    ND-074-032

    Includes:
    1 x HLSRC 20/6 ND Tuned valves
    1 x Compression and rebound shim stack kit
    1 x o-ring
    1 x piston ring

  • 40/12 HLSRC valve kit

    ND-074-032

    Includes:
    1 x HLSRC 40/12 ND Tuned valves
    1 x Compression and rebound shim stack kit
    1 x o-ring
    1 x piston ring

Dual-flow valves

HLSC and HLSRC valves have 2 circuits
A - Low-Speed Circuit
B - High-Speed Circuit

HLSRC Valves

Independent high and low-speed compression and rebound control.
Superior terrain reading.
Increased high-speed damping reinforcement. (Fundamental in PDS systems)
Increased cornering traction, acceleration, and braking
Smooth low to high-speed transitions.
Optimized channeling for a smooth fluid flow.
Decreased rear shock operation temperatures.
Increased time intervals between maintenance services.

HLSC Valves

Independent high and low-speed compression control.
Superior terrain reading.
Increased high-speed damping reinforcement.
Smooth low to high-speed transitions.
Optimized channeling for a smooth fluid flow.
Reduced fork operating temperatures.
Increased time intervals between maintenance services.