Triumph / BSA Crankshaft Main (Ball) Bearing (1) - 70-1591 - Choose Bearing Type Brand - Part # - Clearance Rating - Application:RHP (England) - #70-1591 / 67-1240 (C3) (Triumph 650 Unit & Pre-Unit To 1971 - BSA A50 / A65 1962-65) Both variations come with clamps

Both variations come with clamps

Please check your bore and piston to determine the ring size you need

this book is widely known as the motorcyclist bible

Also fits many Triumph & BSA Rocket III/Trident models

Sprocket accepts a standard 530 or 5/8" X 3/8" chain

Triumph / BSA Crankshaft Main (Ball) Bearing (1) - 70-1591 - Choose Bearing Type Brand - Part # - Clearance Rating - Application:RHP (England) - #70-1591 / 67-1240 (C3) (Triumph 650 Unit & Pre-Unit To 1971 - BSA A50 / A65 1962-65) Both variations come with clampsToday 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 different 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