Oil-cooled GSX-R1100: here’s what to pick! GSX-R1100K BITO Magtank JB2 Step KIT Axle Shaft Sunstar Brake Disc DID Drive Chain and more

Hey there, good evening!
This week felt a bit strange since Tuesday was a holiday.

I ended up going out for tonkatsu again at lunch today.
If you’re ever in the Kakino-kizaka area, be sure to grab some tonkatsu before you head home.

With that said, I’ll keep working away.

(The rumored KatieX: free motorcycle appraisal and sale! This is the new way to sell)

GSX-R1100K front axle is shared with GSF1200

OEM part number 54711-17C00 (17C10) equivalent.
GSF1200/GSX-R1100K/Bandit 1200 up to K5/GS1200SS/GSX-R750J&K
In short, just remember it’s for upright forks.
*Inazuma 1200 won’t work, but it can be installed if you machine the bottom case.


It fits perfectly like this.
You could think of it as a compatible part for OEM components.

By the way, here’s what it looks like with an inverted long installed.


By the way, with an inverted forkOEM part number 54711-17D00 (it’s a bit hard to see at first glance—it’s a D).
With this part number, the shaft overall length becomes 10 millimeters longer.
As shown in the image above, it sticks out 5 millimeters on each side.

When it’s like this
an inverted long is being usedso watch out for that.

A hidden gem—a step kit that makes riding even more fun!

It subtly makes riding easier.
Most bikes surprisinglyfeel more comfortable lower in frontI think.

Taking into account your body type, riding style, and use case when choosing parts is the way to go.
Since parts like this don’t sell in huge numbers
it wouldn’t be surprising if they got discontinued anytime.

Grab one while you can.

ウェビック 楽天市場店
¥75,810 (2026/09/22 19:35時点 | 楽天市場調べ)

The rear axle shaft is also shiny and cool

The design is simple and really beautiful.
When the undercarriage gleams, the bike instantly looks younger.

Magtank JB-2 (custom size) rear 4.50-17

The front brake disc is large so it’s hard to see well.
I kept the wheel size the same as stock front and rear.

Tire selection is subtly abundant and you won’t have trouble finding options going forward.
What you notice right away on a test ride is how light the wheels are.
Both pushing and riding feel like you’ve switched from dress shoes to sneakers—there’s a real sense of nimbleness.

Combined with the wheel size, it becomes pleasantly agile
and the ride feel makes you wonder if it’s a 400cc.
It’s a bit niche, but it’s easy to handle and felt like a really good choice.

The front brake disc is BO so it’s back home for now.

Since the bike was so clean, I did a thorough job with masking for the test ride.
All done! (*´ω`*)

ウェビック 楽天市場店
¥132,000 (2026/09/15 21:33時点 | 楽天市場調べ)
ウェビック 楽天市場店
¥30,800 (2026/09/22 19:35時点 | 楽天市場調べ)
ウェビック 楽天市場店
¥75,810 (2026/09/22 19:35時点 | 楽天市場調べ)
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