Tom Cruise would be impressed? Visualizing the current state of this legendary machine. GPZ900R’s “Machine Conditioning Report” and basic maintenance

This is a new customer from the hidden menu.
Basically we don’t accept them, so it’s just not realistic to do it.

The bike is an incredibly clean Ninja.
It’s running comfortably without any major failures, so there hasn’t been an opportunity to do maintenance.
So I’d like to do a thorough check on various details.

Stock carburetor with air cleaner box and standard front fork

From now on, new customers will
only be accepted if they have “stock carburetor with air cleaner box and standard front fork”
vehicles. *We’re still not accepting new customers.

The thing is, with custom bikes that have been heavily modified, you can’t tell what any single part is.
I want to minimize worries in this rural lifestyle.

Tire and wheel inspection

Lift both front and rear, wipe with a damp towel, and check carefully.
It’s work anyone can do themselves, but people rarely do it…

Occasionally checking for foreign objects and uneven wear is really important.

I check the wheel size, tire size, manufacturing date, and if aftermarket, the JWL marking.
I labeled it with P-TOUCH so there’s no panic during vehicle inspections.

Checking brake disc condition

The thickness is solid, so no worries (*´ω｀*)
Of course, wear varies from inside to outside the contact surface, so measure carefully.

I check the brake pad brand and remaining thickness, then peel off the friction material surface.
I chamfer only the entry direction and deburr the backing plate.

Brake pads never wear uniformly front to back or top to bottom.
What? Which thickness should I check? The thinnest spot…

Even 0.1% improvement adds up—maintenance is all about accumulation.

If there’s a shim, I label it with P-TOUCH.
Since it’s a 1.1mm shim, I don’t want a tire shop accidentally installing it as an outer washer.
Making it clear to anyone who looks at it gives peace of mind.

Mystery scratches on the rear disc bolt…
They’re not in the wheel rotation direction, so I wonder what caused them.

Well, anyway

Cleaning the brake calipers

The brake calipers are so clean, it’s easy work—I was scrubbing away happily.
I check for cracks specific to Brembo Racing calipers.

For a moment I thought I was seeing things, but looking very, very carefully, there’s no doubt.
Brembo Racing cracks can occasionally appear in this vertical, fiber direction so check it out.

By the way, the bleeder nipple is tapered, so it won’t leak easily.
With a banjo bolt it would weep. *Worth reconsidering

Rear wheel bearing is shot ( ；∀；)

Surprisingly stiff… way too stiff.
This isn’t an adjustment issue. I was struck by how these things happen.

And the timing to bring it in for work was perfect?
Bikers have a sixth sense about these things…

I also check the pivot-to-axle length.
Left and right adjustments were spot-on.

I also labeled the shift pattern.

Looking at it this way, P-TOUCH is incredibly useful.
It’s not just for bikes—you can use it for organizing things at home too, so having one is really convenient.

If I could print the same 9mm I use regularly, even a lower-grade model would work.
P-TOUCH is strong against solvents and chemicals! And there’s no residue when you peel it off.

If you use Tepra, you’ll definitely regret it… I did.

I also cleaned up the raw collar nicely.

The axle shaft runout was also fine.

Cold compression measurement reveals starting ability

Only cylinder 1 is slightly low at 0.7 MPa, while cylinders 2-4 are at 1.2 MPa.
Since this is a cold measurement, it’ll be a bit higher when warm.

Like everything, seeing numbers makes you worry.

The spark plugs are burning beautifully.

Since it’s a model year with secondary air injection, it’s likely working well.

Fresh fuses. The used bike ritual

Left is used, right is new.

Fuses work fine as-is, but “I’m the type who wants new ones for peace of mind”
Replacing them doesn’t really change much, but “Doesn’t new feel reassuring?”

That’s what maintenance is about—building up those reassuring details.

The air filter was starting to deteriorate too. I’ll replace it.

That’s how we’re continuing with various tasks.