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Front Brake Master Cylinder – fitment & spongy lever after upgrade

Forum|Forum|4 months ago
November 11, 2025
40 replies
260 views

Replacing stock master cylinder with an aftermarket unit. Lever feels a bit spongy even after a quick bleed. Looking for best-practice on piston size, banjo/crush washers, ABS compatibility, and bleed order.

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Best answer by Sudhanshu

Full bleed order matters on ABS bikes: MC → ABS module → calipers. Vacuum + reverse bleed helps.

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Check the tiny return port in the reservoir isn’t clogged.

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https://sud-en.ge-236962.almostinsided.com/rebelskin-paint-wraps-349/front-brake-master-cylinder-fitment-spongy-lever-after-upgrade-613

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Scroll on new L1 post not working WORKS

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