SOHC.co.uk Forums > CB500/550

Caliper orientation

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SpannerBrat:
Hi,
As part of my ‘76 K2 cafe / brat build, I found out I had non-std forks (CB750 SS / similar) so I’ve taken the opportunity to convert the front end to a twin disc setup using CX500 callipers (the one calliper I bought within the box of nuts’n’bolts’n’stuff was CX...../ similar). I found a matching cal [ Guests cannot view attachments ] [ Guests cannot view attachments ] liper for the other side & overhauled both parts. However, it appears that they’re not a mirror of each other. The hangers are handed (R & L as can be seen in the attached but the brake hose mounting points appear to be in the same position in both sides.
So my 1st question is - does it matter? I’m planning on a single hose to one calliper & looping over to the other so having matchy-matchy hides isn’t a worry for me (although it would have been nice for asthetics).
My 2nd question related to the location of the callipers - I’ve seen std bikes of the era of various cc’s with them both in front of the forks & behind (as I currently have them). Is there an optimum configuration and are there any issues (safety / performance) with having them one way or the other?
Thanks for any help / info.

ka-ja:
They should be "handed" so the bleed screw is above the fluid inlet, better of with two hyd. lines using a long banjo bolt at the master cylinder.

SpannerBrat:
At least they’re on the correct side of the forks!
So my LHS is OK but the RHS is not.
I had considered running 2 lines from the MC - 1 to each side -  & still might. I’d just thought that one line down to the wheel with a connecting line was cleaner (I could imagine that bleeding would be easier with 2 same length lines tho).
So, will the RH calliper cause me problems (bleeding?) as it is?

Lobo:
Spanner... appreciate the boss sizes look slightly different, but can you not swap the hose and nipple over on the rhs?
A long & recent 750 thread on it here...
http://www.sohc.co.uk/index.php/topic,21171.msg189251.html#msg189251
Simon

ka-ja:
A two pipe system definitely makes bleeding a lot easier, as you are not "pulling" fluid back uphill as with a crossover which will tend to airlock. You may be able to bleed as by rotating the disc cyl. on one bolt.

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