Hy CraiginMO, the largest brake cylinder bore I could find was 1 1/4" all the way up to the 80 series. the Napa numbers are,
UP34404, 1 1/8" brake cylinder, 1 1/8" clutch cylinder $79.49
UP19089, 1 1/4" brake cylinder, 1 1/8" clutch cylinder $214.00
I don't know why the discrepancy in price between the two, hope that helps.
