Uploaded November 2022 | Updated September 2026, 2 weeks ago

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In this video we attempt to replace the irreplaceable. Commonly seen on older hydraulic brake or clutch master cylinders, is a failing sight glass window.

It took decades of sun baked torture to destroy the sight glass on your bike's brake cylinder...

And If yours looks anything like the one I show in this video.

It's a few brake lever squeezes away from ruining your day and could even become pretty dangerous out on the road.

With a little patience and some common tools you have laying around. You can champion this repair in just a few minutes.

Don't let that gross looking brake master sight glass be the ugliest part on your bike! REPLACE IT!

SIGHT GLASS SOURCE -- amzn.to/3sUPgXN

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