Triumph / BSA Crankshaft Main (Ball) Bearing (1) - 70-1591 - Choose Bearing Type

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Today we would like to offer you new RHP crankshaft ball bearings for both Triumph & BSA twins. To be clear, we offer 2 types of ball bearings with the CN & C3 racing for 2 differe nt applications - both bearing measure the same @ 1.1250" (ID), 2.8125" (OD) & .8125" (wide) "C3" crankshaft ball bearings fitted to Triumph 650 unit twins on both the drive side and timing side from 1963-1965 and also Triumph 500 & 650 pre-unit twins on both sides. BSA A50 & A65 unit twins from 1962-1965 used a "C3" ball bearing The only models that used the "CN" type bearing where the Triumph & BSA triples (T150, A75, T160, etc). Please select the bearing you need based off the info we have provided you... Use the drop down menu to select which bearing you desire - choose from application and clearance rating for your engine **Features** Made in England by RHP OEM part number is 70-1591, E1591 & 67-1240 Free shipping in the USA (lower 48) Show more