This swingarm maintenance kit contains the bearings, collars, sleeves, and seals required to rebuild the rear suspension pivot on compatible motorcycles.The components are designed to restore factory specifications for the swingarm assembly. Kit Contents: 2 Swingarm Bushings measuring 17mm x 22mm x 47mm corresponding to part number 52141-MKE-A70. 2 Oil Seals measuring 30mm x 37mm x 4mm corresponding to part number 91251-MKE-A01. 2 Oil Seals measuring 22mm x 29mm x 4mm corresponding to part number 91252-MKE-A01. 2 Needle Roller Bearings measuring 22mm x 29mm x 30mm corresponding to part number 91071-MJ0-004. 2 Thrust Bearings measuring 22mm x 35mm x 5mm corresponding to part number 91072-KZ3-861. Compatible With Models: CRF250R model years 2020 through 2022. CRF250RX model years 2020 through 2022. CRF450R model years 2019 through 2022. CRF450RWE and CRF450RWE Works Edition model years 2019 through 2022. CRF450RX model years 2019 through 2022. Please verify your motorcycle model year and measure existing parts before purchase to proper fitment.Installation instructions are not included.