The Z900RS has an automatic spring-loaded tensioner. If you ever remove it, you must follow the manual’s “reset procedure” to wind back the ratchet spring. If you don’t, you will install a locked tensioner and snap your cam chain.
: 99832-0016-09 covers models from 2020 through 2025. Older 2018–2019 models may use part number 99924-1537-08 . Kawasaki Z900rs Service Manual