Yes, replacement CSUs are available for the 2016-2022 Yari A1-B3. CSUs are available in Boost and non-Boost configurations, as well as Dual-Position Air (DPA) and SoloAir/DebonAir.
Non-Boost:
11.4018.008.438 FORK CSU - SOLO AIR 27.5 42 OFF-SET ALUMINUM TAPER BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.008.440 FORK CSU - SOLO AIR 27.5 42 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.008.446 FORK CSU - SOLO AIR 2951 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.008.443 FORK CSU - DUAL POSITION AIR 27.5 42 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.008.449 FORK CSU - DUAL POSITION AIR 29 51 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
Boost:
11.4018.090.000 FORK CSU - DEBONAIR 27.5/29 46 OFF-SET ALUMINUM TAPER BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.090.001 FORK CSU - DEBONAIR 27.5/29 46 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.090.003 FORK CSU - DEBONAIR 27.5/29 37 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.090.018 FORK CSU - DEBONAIR 29 BOOST 42 OFF-SET ALUMINUM TAPER GLOSS BLACK (NO GRADIENTS) LYRIK ULTIMATE C2-C3 (2020-2022)
11.4018.090.005 FORK CSU - DEBONAIR 27.5/29 42 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.090.006 FORK CSU - DEBONAIR 27.5/29 51 OFF-SET ALUMINUM TAPER BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.090.007 FORK CSU - DEBONAIR 27.5/29 51 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.090.052 FORK CSU - DEBONAIR 27.5/29B 44 OFF-SET - 69OD - 1.5 TAPER GLOSS BLACK (NO GRADIENTS) - LYRIK C2-C3 (2020-2022)/YARI B2-B3 TREK LC (2019-2022)
11.4018.090.053 FORK CSU - DEBONAIR 27.5/29B 44 OFF-SET - 69OD - 1.5 TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK C2-C3 (2020-2022)/YARI B2-B3 TREK LC (2019-2022)
11.4018.090.054 FORK CSU - DEBONAIR 27.5/29B 44 OFF-SET - 69OD - 1.8 TAPER GLOSS BLACK (NO GRADIENTS) - LYRIK C3/YARI B3 (2021-2022)
11.4018.090.055 FORK CSU - DEBONAIR 27.5/29B 44 OFF-SET - 69OD - 1.8 TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK C3/YARI B3 (2021-2022)
11.4018.090.056 FORK CSU - DUAL POSITION AIR 27.5/29B 44 OFF-SET - 69OD - 1.8 TAPER GLOSS BLACK (NO GRADIENTS) - LYRIK C3/YARI B3 (2021-2022)
11.4018.090.057 FORK CSU - DUAL POSITION AIR 27.5/29B 44 OFF-SET - 69OD - 1.8 TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK C3/YARI B3 (2021-2022)
11.4018.008.455 FORK CSU - DUAL POSITION AIR 27.5 BOOST™ COMPATIBLE 15X110 42 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2016-2022)/YARI A1-B3 (2016-2022)
11.4018.008.461 FORK CSU - DUAL POSITION AIR 2927+ BOOST™ COMPATIBLE 15X110 51 OFF-SET ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - LYRIK B1-C3 (2026-2022)/YARI A1-B3 (2026-2022)/PIKE 29+
RockShox service kits and spare parts are best obtained through your local shop or dealer. See our dealer locator, below, to find a dealer near you. If no one is currently listed near you, then please search for local shops via your preferred web browser.
https://www.sram.com/en/dealer-locator
Manuals and additional information about RockShox and SRAM components can be found at our service site, linked below.
https://www.sram.com/en/service
Further questions?
Reach out to Rider Support by Asking A Question at the link below.
https://www.sram.com/en/rockshox/campaigns/rockshox-rider-support