Triumph & BSA Unit Singles Crankshaft Ball Bearing. You will get the one bearing as pictured. Looking for the best quality bearing you can buy for your Triumph or BSA unit single? Well you have found it. Bearing has the correct C3 internal clearance! Measures 25mm X 62mm x 17mm! Fits Triumph & BSA Unit Singles on the timing side (C15, C25, B25, B40, B44 & TR25W Trophy) from 1967-1971. Fits BSA C15 & B40 models on the drive side from 1959-1966. Also fits various BSA C10, C11 & C12 models. Please refer to your parts catalog and measurements for proper fitment!Made by Nachi
O.E.M Part number is 70-8003, 24-0732, MJ25 or 6305