RockShox Charger 2.1 RC2 Upgrade Kit - Lyrik
RockShox

RockShox Charger 2.1 RC2 Upgrade Kit - Lyrik

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Direct-fit Charger 2.1 RC2 right-side damper upgrade for Lyrik B1+/Yari A1+ (2016+). Adds Crown high- and low-speed compression control and complete right-side internals for crisper, more adjustable fork performance.

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Product Details

Overview & Technology: Charger 2.1 RC2 Damper Upgrade

RockShox Charger 2.1 RC2 is a right-side damper upgrade kit engineered to bring Crown-style High-Speed and Low-Speed compression control to Lyrik B1+ and Yari A1+ forks (2016 and newer). The kit includes the complete right-side internals — everything you need to convert or refresh the damper side for more refined compression tuning and improved consistency under load. The Charger 2.1 architecture focuses on split-flow valving with distinct high- and low-speed circuits. That separation lets you tune small-bump compliance and midstroke support independently from big-hit control, giving a more planted feel at speed and enhanced traction in technical terrain.

Key Features & Real-World Benefits

Complete right-side internals — the kit replaces the damper cartridge internals so you regain factory tolerances and performance without replacing the entire fork. Riders notice crisper midstroke support and more controlled rebound behavior after the upgrade. High-speed compression helps tame square-edge hits and rocky chatter at speed, while low-speed compression lets you dial in cornering support and pedaling platform. Together, these controls reduce fork pitch on steep, technical descents and improve feedback for confident line choice.

Fit, Materials & Compatibility

This Charger 2.1 RC2 kit is designed specifically for Lyrik B1+ and Yari A1+ forks from 2016 onward. SRAM model ID FS-UPK-CH21-A1 and manufacturer part number 00.4020.170.000 identify the exact application. The kit is a direct fit for compatible lowers and crown assemblies — no chassis modification required. Internals are precision-machined for consistent valving performance and use service-grade seals and bearings to maintain damping characteristics over repeated use. As with most damper cartridge service parts, installation requires standard suspension service tools and a torque wrench to ensure correct stack-up and leak-free operation.

Who This Upgrade Is For

Enduro and aggressive trail riders who demand sharper control at speed and tunability for varied terrain will get the most from the Charger 2.1 RC2 upgrade. If your Lyrik/Yari feels vague on big hits, lacks supporting midstroke, or has lost compression adjustment precision after heavy use, this kit restores and upgrades damper performance. Also ideal for riders who want the flexibility of separate high- and low-speed compression adjustment to fine-tune handling for bikepark laps, steep descents, and demanding technical stages.

Key Features

  • ✓ Direct-fit right-side Charger 2.1 internals for Lyrik B1+/Yari A1+ (2016+)
  • ✓ Crown-style High-Speed and Low-Speed compression circuits for precision
  • ✓ Includes complete right-side damper internals — no extra parts required
  • ✓ Restores midstroke support and improves big-hit control at speed
  • ✓ SRAM Model ID FS-UPK-CH21-A1, Manufacturer P/N 00.4020.170.000
  • ✓ Precision-machined valve stack for consistent damping under load
  • ✓ Ideal for enduro and aggressive trail riders seeking refined control
  • ✓ Ships as a compact kit (24.75" x 3.3" x 3", 1.1 lb)

Specifications

Misc Lyrik B1+/Yari A1+ (2016+)

Product Identifiers

Vendor Item # 00.4020.170.000
UPC 710845829383

Frequently Asked Questions

Will this Charger 2.1 RC2 kit fit my Lyrik fork?

This kit is a direct fit for Lyrik B1+ and Yari A1+ forks from 2016 onward. Confirm your fork model/year and serial number if unsure — the kit uses SRAM ID FS-UPK-CH21-A1 and Mfg P/N 00.4020.170.000 for verification.

Can I install the kit at home or should I use a shop?

Experienced home mechanics with suspension tools and service knowledge can install the kit, but correct damper reassembly and torque settings are critical. If you’re not comfortable with fork disassembly or don’t own proper tools, have a qualified suspension tech fit and bleed the damper.

What performance improvements should I expect?

Expect improved small-bump sensitivity, firmer midstroke support, and better control over high-speed impacts thanks to separate HS/LS compression circuits. Tuning the low-speed compression will increase stability in corners and under braking.

Does this kit include seals and bushings?

The Charger 2.1 RC2 kit supplies the complete right-side damper internals. Standard wear items like fork wipers and lower-leg bushings are not included and should be checked separately during service.

How often should I service the damper internals?

Service intervals depend on use and conditions; RockShox generally recommends inspecting and servicing damper internals every 50–100 hours of riding or annually for aggressive use. Replace seals and fluid during routine service to maintain performance.

Is this the same as a full Charger 2.1 cartridge replacement?

This kit provides the Charger 2.1 RC2 right-side internals specifically for Lyrik/Yari applications. In many cases it refreshes damper performance without replacing the entire fork, but a full cartridge swap may be recommended if other components are damaged.

Buying Guide

When choosing a damper upgrade kit, match the kit to your fork chassis and model year — compatibility is critical. The Charger 2.1 RC2 upgrade targets riders wanting separate high- and low-speed compression control to tune both big-hit damping and midstroke support. If your fork feels vague or you want greater adjustability for aggressive trail and enduro riding, this kit is an efficient way to restore and upgrade performance without replacing the entire fork. Consider whether you’ll perform the installation yourself or have a shop do it. While the kit includes the necessary internals, a full service (fresh seals and fluid) at installation time ensures long-term reliability and peak damping function.

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