Aftermarket Stainless Steel Brake Pistons

Bonwit · Feb 23, 2022

I recently purchased a used front brake caliper on EBay. It’s in generally good shape, except the pistons show some minor pitting. I’m guessing they are the original chrome plated steel part. I’m figuring I should replace these with a set of new stainless steel pistons. Looking on eBay, I see the prices for replacement SS pistons runs anywhere from $35 to $70. Has anyone here purchased the cheaper aftermarket pistons? Is there any reason to spend $70 on a set of “genuine” Norton pistons?

Frankie17 · Feb 23, 2022

i have used stainless pistons sourced from E bay UK no issues

Craig · Feb 23, 2022

When I rebuilt mine with SS pistons , braided hose etc. got all my parts needed fro britcycle , e-bay can have iffy quality and prices don’t reflect that ….

rweb · Feb 23, 2022

A couple years ago I used the SS pistons from The Bonneville Shop with new hose and M/C kit. Changed to DOT 5 brake fluid, which some say is a no-no and all is well.. A yes from me on the SS pistons.

SteveC · Feb 23, 2022

I used the SS caliper pistons from RGM. Good quality and a good fit. The steel pistons I took out were in a really bad state, so another yes for SS pistons.

ntst8 · Feb 23, 2022

To my mind it its worth supporting the name suppliers with the small stuff so that they are still there when you need the harder to get stuff.

kommando · Feb 24, 2022

The cheaper ones will most likely be missing the machined reliefs so the fluid will not be able to get behind the pistons to push them out when installed fully retracted.

Frankie17 · Feb 24, 2022

never seen a piston with machined reliefs on the rear they do have a slight step on the face ?

in this age of CNC machinery it is easy to replicate these pistons lots of small engineering shops can produce stainless parts to a very high standard

Time Warp · Feb 24, 2022

I got the ones with the internal threaded bosses (for removal) they seemed like a very tight fit with new AN seals.

L.A.B. · Feb 24, 2022

Frankie17 said:
never seen a piston with machined reliefs on the rear they do have a slight step on the face ?

caliper problem

An eye dropper will work or a small coffee stirring straw utilizing capillary action; the goal is to present the bleeder bore with small droplets. Syringes can be purchased at auto parts stores. You can go to your local pharmacy and buy any size you like, and if this makes you feel a bit...

www.accessnorton.com

The way to avoid the problem of the inner piston blanking off its drilling is to install it only as far as necessary to fit the pad, not press it all the way in.

kommando · Feb 24, 2022

Frankie17 said:
never seen a piston with machined reliefs on the rear they do have a slight step on the face ?

OEM piston off a 74

Aftermarket Stainless Steel Brake Pistons

Outer edge is lowest, roughly machined is middle height and inner chrome is highest.

Frankie17 · Feb 24, 2022

the recess is on the face of the piston all the pattern stainless i have used ones have this step
forgot Norton piston fit arse about face in the caliper

Aftermarket Stainless Steel Brake Pistons

Bonwit

Frankie17

Craig

rweb

SteveC

ntst8

kommando

Frankie17

Time Warp

.......back to the 70's.

L.A.B.

Moderator

caliper problem

kommando

Frankie17

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