I see that Whitepost only mentions brass sleeves. I read some years ago in Skinned Knuckles magazine that the brass or bronze sleeves were okay for restorations that aren't driven much, but will wear quickly in cars driven a lot. Such cars should have stainless steel sleeves installed, the article said. Precision stainless steel thin wall tubing is available.
Makes sense! Seems I will have to reverse engineer this M/C, find the guts, springs, rubber "pucks", plunger, etc.. first than pick bore to fit..................................................
From experience I too recommend Karps PB in Upland California. Explain the issue before you make changes. Talk to Sally or Jeff.
I have the same issue, same parts (Chev pickup truck brake/clutch MC) GM calipers on the front. 56 Chev drums on the rear. I would like more stopping power. Can anyone can furnish an experienced answer on bore size for the brake bore and what vehicle uses that size piston/seal combination? Thanks.
Karps & the other 2 I called wanted 100 per hr., another wanted $200 a hole. None of that is going to happen.........................................................
Probably already read this; but there is a good run down on down size sleeving a GM master here. http://www.brakecylinder.com/oddsandends.htm
I have used Apple Hydraulics for downsizing the bore. It's been some time back but it was not that expensive. They supplied all the piston, cup, and spring parts. As I recall I had them go from 1 1/8" to 7/8".
Maybe if you can locate one; an IHC dual master which has 1" bores (pretty sure) would be more in line with the discs. Of course, it doesn't look as quite the same as a Chevy truck dual master.
The 1" bore IHC has a center line to each bore of over 3", my holes in the fire wall & brake assembly on the other side are set up for the 2 1/2" center line. Don't want to alter it!
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