Description The 2-piece Chain Guide Block by Acerbis replaces the stock/OEM drivetrain component on your MX / offroad motorcycle. Greater impact resistance thanks to the high-strength plastic material used The controlled elasticity structure of the chain guide absorbs shocks and minimizes damage to the chain and sprocket The chain guide unit is made of 2 pieces: the guide/block body and the bottom plate/slide. The plate is replaceable once worn, and allows you to not have to disassemble the chain when replacing the plate or the guide unit itself Replacement parts available 17949 = HondaCRF 250 R 2007-24;CRF 250 RX 2019-24;CRF 250 X 2007-18;CRF 300 RX 2019-24;CRF 450 R 2007-24;CRF 450 RX 2017-24;CRF 450 X 2007-1824815 = Honda CRF 250 L 2021-23;CRF 300 L 2021-23;CRF 300 RALLY 2021-2317950 = KawasakiKX 250 4T 2020-24; KX 250 F 2009-19; KX 250 X 2021-24; KX 450 2020-24; KX 450 F 2009-19; KX 450 X 2021-2416451 = KTM / Gas Gas / Husqvarna / Sherco fits multiple models25962= KTM / Gas Gas / Husqvarnafits multiple models17951 = SuzukiDRZ 400 E 2000-23; DRZ 400 S 2000-23; RM 125 2007-08; RM 250 2007-08; RMZ 250 2008-18; RMZ 450 2005-17; RMZX 2010-1723072 = SuzukiRMZ 250 2019-24;RMZ 450 2018-2417952 = YamahaWR 250 F 2003-24; WR 450 F 2003-23; YZ 125 2005-24; YZ 250 2005-24; YZ 250 F 2003-23; YZ 250 FX 2019-24; YZ 450 F 2003-22; YZ 450 FX 2019-2224657 = YamahaTenere 700 T7 2019-23; T7 Explore2023; T7 Extreme 2023-24; T7 Rally 2020-23;T7 World Raid 2022-2325764 = YamahaYZ 250 F 2024; YZ 450 F 2023-24;YZ 450 FX 2023-24