Caliper O ring

[jomama]

OK Lads, after a long process I was able to finally get the front caliper on my 76 cb360 apart. Piston and bore are in great shape so the only remaining part in question is the O ring . Being as how the edges are squared off is it possible to replace it with an O ring and if not, is this part available without buying a rebuild kit? Tahnks for any assistance.

 

[noexit]

You should be able to get that seal from pretty much anywhere that sells vintage parts, and even from Honda. If you haven't re-done your master cylinder, get a kit for that too. Don't use an o-ring.

 

[crazypj]

If you want the brake to work you need the correct square edge seal
The bore it it's in is machined with a slight angle so 'inside' edge is slightly higher than outside.
Fluid pushes on piston and seal.
An 'O' ring will let fluid leak out

 

[noexit]

It also causes the seal or roll slightly when the brakes are applied so that when you release the brake, the piston retracts slightly.

 

[DrJ]

Still available from Honda.