CNC Timing Cam Chain Tensioner Lifter Adjuster For CRF450 CRF250 CRF230 CRF150 F R X RWE L RL CRF 250L 300L 450L Rally Steplessly adjustable timing cam chain tensioner designed to replace OEM tensioner on performance engines. Manually set the cam chain tension and keep the tension constant. Reduces engine noise, rattling, excessive chain wear, or changes in camshaft tension. CNC-machined from 6061-T6 billet aluminum with anodised finish, 304 stainless steel bolt and nut. Specification: Material: Aluminum & Stainless Steel Color: Black, Red, Silver Part Type: Manual Cam Chain Tensioner Quantity: 1 piece (includes gasket/) Product Fitment: Fits CRF150, CRF230, CRF250, CRF450, R, F, X, RL, CRF250L, 300L, Rally models (except CRF250R 2018 and newer). CRF150R/RB 2007-2024 CRF150F 2003-2017 CRF230F 2003-2019 CRF230L/M 2008-2009 CRF250F 2019-2024 CRF250L/M/Rally 2012-2020 CRF300L/Rally 2021-2023 CRF250R 2004-2017 CRF250X 2004-2017 CRF450R 2002-2024 CRF450RX 2017-2024 CRF450RWE 2019-2024 CRF450X 2005-2024 CRF450L 2019-2024 CRF450RL 2021-2024 Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.