Out-of-print “OEM-size brake discs.” With EBC, they even stock brake discs for ultra-niche car models.

Yeah, it’s really frustrating when consumable parts go out of print.
When a brake disc is discontinued, things get serious.

You really need to check consumable parts carefully before buying a motorcycle, or you’ll end up in trouble.
If OEM parts are discontinued and no replacement exists, you’re looking at hunting for used parts, having a custom disc made,
or replacing the whole wheel—things escalate quickly.

Even if there’s an oversized disc with the same mounting dimensions,
you’ll also need calipers, caliper supports, brake hoses, and more.
Once it gets that complicated, before you know it
you’re swapping out the front fork (front end), and things just keep spiraling.
This is where THE custom mod rabbit hole begins.

Full custom—in the end, all that’s left is the frame, engine, and bodywork…

That’s when EBC brake discs come to the rescue.
They support quite a few rare bikes, so I think EBC saves a lot of people

ヨシムラ(YOSHIMURA)
¥12,620 (2026/09/21 02:00時点 | Amazon調べ)

EBC’s stainless discs are DB 420 material

There are limited stainless materials that can be heat-treated and hardened for brake use.
Domestic and major manufacturers use different DB materials.
I’m writing about EBC here, but I’ve never actually used them myself.

Brake discs from the 1980s seem far inferior compared to those from 2000 onwards.
Maybe those old discs that didn’t feel great were DB420?
That would be a bit concerning, but…
Better than nothing? Don’t expect too much? You might as well give them a try.


GS1000 is 276mm with three types of floating discs

GS 1000 EBC brake discs are here

It’s compact yet floating, which looks really cool.
And the odd number of 9 pins is another little detail that tickles the fancy.

Oil-cooled early GSX-R750 GR series also has 300φ!

This uncommon special size 300φ is available too.
For those who want to stick with the original design, this is a good option.

Oil-cooled early GSX-R750 GR series rear is also in the lineup.
The thickness isn’t listed, which is a bit concerning…

Oil-cooled early GSX-R750 GR series

For models not sold by Sunstar, try searching.

Basically, if you can get a brake disc from Sunstar, that’s the safest choice.
If you really love EBC’s design, it might be worth considering.


I thought maybe the Z 1000 LTD rear 277mm might be available, but surprisingly it wasn’t.
It seems they don’t cover models with very limited compatibility.

If you look up the part number properly, you might find something unexpected??

Sometimes for some reason Monotaro carries them, Euro Direct also makes them available.

If you’re stuck without a brake disc, give this a try.
I haven’t actually used them myself, so I can’t guarantee they’re absolutely safe!
But consider it as one possibility.

バイク用品はとやグループ2号店
¥43,459 (2026/09/22 19:35時点 | 楽天市場調べ)
株式会社ヒロチー商事 楽天市場店
¥54,698 (2026/09/22 13:35時点 | 楽天市場調べ)
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