ES2 big end

Hi. Trevor, dont know where you had your bearing from but you could try RGM

https://www.rgmnorton.co.uk/buy/es2-m50-16h-etc-big-end-bearing_345.htm

just noticed it says out of stock

Barry

Hi Trevor,

The ES2 big-end remained unchanged from 1933 to 1963. The outer bearing ring that fits into the con-rod is 2 inches outside diameter. The flywheel journals are 1.020 inch. The centre bearing journal, which seems to be the problem, is approximately 1.135 inch butcan vary fractionally from one manufacturer to another but any variation is counteracted by the thickness of the outer ring as all makes use 34 (17 per row).250 inch rollers. A larger journal gives a larger clearance between the rollers. All this means you must fit the whole assembly as a matched unit. I'm not sure what crank-pin was fitted to your engine but 1 and 17/64 (1.265) inch doesn't seem to be a Norton part. Just a final note of caution, some of the newly made outer bearing rings might be slightly too big and when fitted to the rod may become oval and need honing.

Regards, Richard.