Hi i have a GPX250R 1988 and it has dual front breaks and the seals have gone in 1 of them so im trying to find new seals but i have pulled them apart before and i swear the two pistons inside are the same size but on all the parts diagrams it shows them as one big and one small so i was wondering if im incorrect or if im looking in the wrong place, also on this diagram it only shows one break not two Hunter Valley Motorsports - GPX250R 1988 - F-4 Front Brake(EX250F-000001&NAMI001647)

also i found this https://www.ebay.com.au/itm/1988-200...cAAOSwlx9cR6wD
but i feel this is closer to whats on the bike https://www.ebay.com.au/itm/2008-201....c100005.m1851