THE Oil-Cooled! GSX-R1100J Non-Running Restoration? Let’s Make Good Use of the 190,000 Yen Crowdfunding Plan?

Good morning (*´ω`*) I’ve been neglecting the blog a bit.
I’ve been pretty busy with back-to-back vehicle inspections and preliminary inspections.

The content is from a bit earlier, but I’ll keep updating.

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J・TRIP OFFICIAL online shop
¥38,500 (2026/09/21 07:35時点 | 楽天市場調べ)
ハセガワ(Hasegawa)
¥1,070 (2026/09/20 16:33時点 | Amazon調べ)

Nissin radial masters come in old and new versions, so be careful

Hose outlet on top = new type
Hose outlet on side = old type

Brake side is old type / Clutch side is new type That’s how it is.

“Old type” 19Φ Nissin Radial Brake Master (side outlet TYPE) OH Kit 62062
“New type” 19Φ Nissin Radial Clutch Master (top outlet TYPE) OH Kit 65995

There are old and new versions, so the hose outlet is “side or straight up” Make sure to check and order accordingly

デイトナ(Daytona)
¥1,927 (2026/09/21 09:35時点 | Amazon調べ)

Before disassembly, the inside of the boot is full of fluid

When I removed the boot, fluid was dripping everywhere.
It’s quite rare to have this much accumulated. I’m a bit curious about what’s inside

You can see a white object in the image, which is a substance hardened like tartar
Thinking about it, it’s possible that at some point it got caught slightly at the lip.

If the fluid hasn’t been changed in years or if it’s a long-term non-running vehicle, always check the brake system.

Comparing the brake side overhaul kit, the cup is indeed swollen and the umbrella has become droopy.
It feels like we discovered it at just the right time.


The structure is very simple, so the cleaning process goes smoothly.

I think it’s best to check the dimensions between old and new just to be safe.

Since I don’t overhaul Nissin radial masters very often, it took a bit of time to gather information.
These old and new repair parts are different so if you forget to remember that, it could get dangerous.

That’s how I’m learning something new every day.

I’ll replace the fluid tank as well

The fluid tank was also getting all dried out and looked like it might crack, so I replaced it with a new smoke-tinted one.

Both the brake and clutch have a firm feel now, so they operate really nicely.

デイトナ(Daytona)
¥2,214 (2026/09/21 08:35時点 | Amazon調べ)
デイトナ(Daytona)
¥2,073 (2026/09/21 09:35時点 | Amazon調べ)

I created an Amazon recommended products page (*´ω`*)

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