Is the 1100K really that popular? (*´ω`*) GSX-R1100K Inspection, Oil, Plug, Air Filter, and Battery Replacement

The weather’s gotten comfortable, and everyone’s eager to get back on their bikes (*´ω`*)
So we’ve got a maintenance request to go along with the inspection.

Time for a gel battery replacement (*´ω`*)

GEL batteries are truly wonderful.
We converted from a flooded battery to MF without swapping the regulator!
Since it’s gel, there shouldn’t be any fluid leaks.
The charger is also basically quiet, which is great. Really the best, I tell you.

A proper initial charge gives you peace of mind.

Best to buy the air cleaner while they’re still available.

13780-17C00 I’m quietly worried about when it might be discontinued (*´ω`*)

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¥3,667 (2026/09/22 18:35時点 | 楽天市場調べ)

Time for an oil change

Looks like last time we used a 21mm drain plug that was left over here.
For consistency and convenience, I always swap it to 17mm.

Let’s investigate the mysterious single-cylinder issue that pops up now and then

Checking the spark plug wire connections.
They were the terminal type, as expected.
This cover is from the early model, which is hard to work with, so I’ll swap it for the softer late-model version.

Due to the spark plug wire length, I’ll leave the terminal as is.
I’ll just swap the cap to reduce the chance of problems.

My guess is the Watanabe unit itself is the culprit.
*Note: Watanabe is a consumable part, so please be aware.

I’ve also put in fresh spark plugs and terminals.

日本特殊陶業(Ngk)
¥898 (2026/09/21 15:35時点 | Amazon調べ)
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¥20 (2024/12/01 17:53時点 | 楽天市場調べ)

Time to change the brake fluid

Since we change it regularly, it was nice and clean.
Now we just need to pass inspection and we’re done (‘Д’)

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