Custom processing is for manual start damper switch Size 53 (mm) Model 16046-MEB-671 Applicable models FCR28 31 33 35 37 39 40 41mm Item No. SCL-2022110027 SCL-2022110024 Specification A plum blossom manual damper, B round manual damper product name : Motorcycle Carburetor Carb Choke Plunger Valve Fit KEIHIN FCR 37 39 40 41 Throttle Valve CRF English Title: 16046-MEB-671 Motorcycle Carburetor Carb Choke Plunger Valve Fit For CRF250X CF250R CRF450R CRF450X 2005 2006 2007 Weight: 50g Pack size 5 *8*2mm Packing Material: Bag Applicable: Fast shipping and good operation Total new and high quality Part number: 16046-MEB-671 Fit for:all Keihi FCR MX carburetors (FCR-MX Flat Slide Carburetor 28mm 31mm 35mm 37mm 39mm 41mm ) 2007-2020 CRF150R 2007-2019 CRF150RB 2004-2009 CRF250R 2004-2017 CRF250X 2002-2008 CRF450R 2005-2017 CRF450X. Please check the part number and compare with pictures pro vided here before purchasing to ensure proper fitment. Package included: 1??Cold STARTER VALVE SET