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Caliper rebuild - axle bolt without o-rings?

  • Thread starter Thread starter LightsOut
  • Start date Start date
L

LightsOut

Guest
I'm rebuilding then brakes on my '82 GS 550M (Z) and I'm a little perplexed by the axle bolts. They have a couple of grooves in them, which look like they should have o-rings - see no. 8 in this fiche:
https://www.cmsnl.com/suzuki-gs550m...-e34_model13484/partslist/FIG-63.html#results

Mine didn't have any (but were also missing the seal between caliper halves for the rear, so wouldn't assume it's correct) but o-rings are also neither in parts fiches nor in any rebuild kits I've seen.

I looked through the guides on BikeCliff's (excellent, thanks for that!) site, and the one for earlier models shows similar bolts with o-rings on them.
Page 7 here: http://members.dslextreme.com/users/cbsaunders/gs/79-Brake_overhaul.pdf

If these later model calipers don't use o-rings on the bolts, why do they have the grooves?


...and one more question, would anyone happen to know the dimensions of the seal (flat o-ring) between the rear calipers? PN 6910734200
no. 5 in this fiche: https://www.cmsnl.com/suzuki-gs550m...-e34_model13484/partslist/FIG-71.html#results

It was completely missing from mine, and that little bugger will cost me $45 shipped... unless I can find a "generic" one with the right dimensions and material (EPDM I assume)
 
No O-ring on the caliper bolts, which are in effect sliding pins. The groove is to hold grease. Use heavy thick moly caliper grease.

No idea about the rear caliper O-ring size. It wouldn't be hard to figure out using some clay to measure installed height. I don't know what material to use for a brake system so can't help you there.
 
Nessism said:
No O-ring on the caliper bolts, which are in effect sliding pins. The groove is to hold grease. Use heavy thick moly caliper grease.
Click to expand...

Ahhh.. of course, that makes sense. Thanks!


steveb922 said:
About ?18 shipped to Sweden from here:

https://www.discountbikespares.co.u...R-JOINT-RF-RG500-RG250-RG125-GSXR-GS-GSX.html

Still expensive.......
Click to expand...

Thanks, good find! I'm unfortunately used to expensive... my wallet is still crying after ordering new intake boots :)
Bookmarked for future use.
 
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