Well then

Let’s start from the front

Front caliper and

Not heavy soiling, but more like long-term storage condition.

Fluid three times
Everything looks clean, but we replaced it anyway.

In the old days this diaphragm would deform quite a bit, but lately it’s been rare…
Wash with water, dry it, and it slides in smooth as silk
Is it because we’re applying a thin coat of metal rubber all over the surface?
That’s unclear ★

We’ll replace the air filter next time

Spark plug is slightly dark

Synchronization is perfect ★
All done!