K-Tech 20IDS Open Cartridge Kit for KTM RC 390 (2014–2021) – 120-014-155-005

The K-Tech 20IDS Open Cartridge Kit transforms the front-end feel of the KTM RC 390 with precision engineering drawn from K-Tech's decades of suspension development at the highest levels of motorsport. Built around the 20mm Independent Damping System, every component reflects aerospace-grade craftsmanship — hard-anodised, super-finished aluminium that is as refined in its finish as it is purposeful in its function.

Key Features

• 20mm Independent Damping System (20IDS) delivers fully separate compression and rebound adjustment, allowing precise, repeatable setup changes on road or track
• 30 clicks of independent compression adjustment and 30 clicks of independent rebound adjustment give an exceptionally wide tuning range for every riding style and surface
• 18 mm preload adjustment range lets you dial the fork to suit rider weight and spring rate without specialist tools
• Increased stroke compared to the original cartridge — 130 mm total travel unlocks the RC 390's chassis potential beyond factory limits
• Aerospace-grade aluminium construction, hard-anodised and super-finished throughout for long service life and consistent performance under repeated load cycles
• Part number 120-014-155-005 ensures an exact, catalogue-correct fitment for the KTM RC 390 (2014–2021)

Engineering & Heritage

K-Tech Suspension has built its reputation supplying damping solutions to World Superbike, British Superbike and Isle of Man TT competitors. The 20IDS open cartridge system is the direct descendant of that race-bred engineering, scaled and refined for production machinery. The hard-anodised, super-finished surfaces on every internal component are not merely cosmetic — they reduce friction, resist corrosion, and maintain damping consistency across the full temperature range you will encounter on a spirited road ride or a full track day. The 36-260 series spring compatibility means you can pair this cartridge with a rate precisely matched to your weight and riding discipline.

Setup & Installation

K-Tech recommends installation by an authorised K-Tech Service Centre to ensure correct setup and to protect the performance of the system. The suggested baseline settings — 16 clicks compression, 16 clicks rebound, 18 mm preload — provide an excellent starting point from which to refine the chassis to your preference. Note that compatible springs from the 36-260 series must be ordered separately; they are not included with this cartridge kit.

Fitment & Compatibility

This cartridge kit is designed specifically for the KTM RC 390 across all model years from 2014 to 2021. Always confirm fork inner diameter and tube length against your specific machine before ordering.

Specifications

• Inner diameter: 20 mm
• Outer diameter: 10 mm
• Length: 682 mm
• Stroke: 130 mm
• Compression adjustment: 30 clicks independent (suggested baseline: 16 clicks)
• Rebound adjustment: 30 clicks independent (suggested baseline: 16 clicks)
• Preload adjustment: 18 mm (suggested baseline: 18 mm)
• Spring compatibility: 36-260 series (ordered separately)
• Material: aerospace-grade aluminium, hard-anodised and super-finished
• Part number: 120-014-155-005