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Buell Forum » 1125R Superbike Board » Archive through April 12, 2014 » Brake caliper pistons « Previous Next »

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Duanelr
Posted on Sunday, March 23, 2014 - 06:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm going to change the seals in my brake calipers, I see in the manual there is a tool for removing the pistons from the caliper body. Is this tool necessary? Can the pistons be removed by grabbing them with your fingers and wrestling them out? Or maybe by using compressed air? Thanks


piston removal tool
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Jdugger
Posted on Sunday, March 23, 2014 - 06:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It's a helpful tool, but not necessary, especially if you are replacing them with new ones.

Use pliers that can grab the edge of them.
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Duanelr
Posted on Monday, March 24, 2014 - 03:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Cool, thanks for the reply. One more question, what size Torx socket is needed to split this caliper? I need to buy one, the manual doesn't say.
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Jdugger
Posted on Monday, March 24, 2014 - 03:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It's not Torx, it's a 12-sided socket thingy. And, I hate them. I think I've used a 10mm 12-point socket (for ordinary hex bolts) with success. I forget, because I've long replaced them.

I replaced mine in the race bike with a Titanium fastener. It's a standard M8, but I don't remember the length.

McMaster sells a nice Flanged Alloy Steel Socket Head Cap Screw that would work nicely. Or, you can use an ordinary socket cap screw with a quality hardened washer.

I recommend you generously apply loctite blue to the bolt, since they are torqued pretty tight and they tend to sit a long time between servicing. You don't want galling if you end up using a stainless or titanium fastener.
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Jaredc01
Posted on Monday, March 24, 2014 - 07:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That 12-sided socket thingy is a triple-square head if you're talking what I think you're talking... They're used a lot in VW's.
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Duanelr
Posted on Tuesday, March 25, 2014 - 05:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

These guys here, number 3:


caliper fasteners


Jdugger, thanks for the heads-up.
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