Rear Brake Cylinders - 5/8" or 11/16"

[repairman600]

I recently sent my 11/16" rear brake cylinders away for re-sleeving.
When I got them back, they were not the same ones, and they were 5/8".
Since my car came with 11/16" cylinders, is 5/8" a proper substitute,
or should I only use the 11/16" cylinders? Is the 5/8" cylinder for a
different car? I have a '72 Z600 coupe. Thanks, Gene

[friend]

11/16 were for Honda 600's built after 01 Jan 1972.  Before that they were 5/8, and on sedans there were single pistion units before that.   If you have 5/8 on both sides they will work, but did you get 5/8's pistons back with the new sleeves?
Bill

> -----Original Message-----
> From:
> anzhonda600owners@yahoogroups.com
> [mailto:anzhonda600owners@yahoogroups.com]
> On Behalf Of
> repairman600
> Sent:
> Tuesday, June 24, 2008 7:38 PM
> To:
> anzhonda600owners@yahoogroups.com
> Subject:
> [anzhonda600owners] Rear
> Brake Cylinders - 5/8" or 11/16"
> I recently sent my 11/16" rear brake cylinders away for re-sleeving.
> When I got them back, they were not the same ones, and they were 5/8".
> Since my car came with 11/16" cylinders, is 5/8" a proper substitute,
> or should I only use the 11/16" cylinders? Is the 5/8" cylinder for a
> different car? I have a '72 Z600 coupe. Thanks, Gene

[Greg]

Rule of thumb, does it fit?  If so, is it bigger or smaller?
Bigger is better – I seriously doubt the 600’s brakes were so good a slightly bigger cylinder would cause lock up.  But a smaller one may make marginal brakes from the 60’s even worse!