BDL Replacement Belt Drive Clutch Hub Replacement Clutch Hub For BDL Belt Drive Kit. Features: Precision machined aluminum Hard anodized finish BDL replacement parts Specifications: Ev-170 fits BDL Evb-2T & Evb1T & Evo-4T belt drives Ev-190 fits BDL EVO 10-S and Evb-3Trb belt drives Note: This part is only compatible with BDL belt drive kits and has no stock application.