Click to expand Tap to zoom Repl Idler Bearing Kit by BDL Save £-89.65 £89.65 | / SKU MCS505335 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart DescriptionBDL, idler bearing kitDetailsReplacement idler bearing kit for closed belt drives. Allows belt tension adjustment. Mounts to inner primary housing. Do not use in combination with polychain type belts that are ribbed on the outside.