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sudhanshu_sabharwal
Sudhanshu Sabharwal
November 12, 2025
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Torque forge Innovation engines

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  • November 12, 2025
  • 26 replies
  • 183 views

Front Brake Master Cylinder – fitment & spongy lever after upgrade

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. Front Brake Master Cylinder – fitment & spongy lever after upgrade. 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.

Pinned Reply By sudhanshu_sabharwal

Did you match piston size to caliper piston area? Oversize MC can feel firm but weak; undersize can feel long/spongy.

26 replies

sudhanshu_sabharwal
Sudhanshu Sabharwal
November 26, 2025

fadsfadfa

Gainsight Product manager
sudhanshu_sabharwal
Sudhanshu Sabharwal
November 26, 2025

fadsfasa

Gainsight Product manager
sudhanshu_sabharwal
Sudhanshu Sabharwal
November 28, 2025

skajbogaewf

Gainsight Product manager
sudhanshu_sabharwal
Sudhanshu Sabharwal
November 27, 2025

bkb,b 

Gainsight Product manager
sudhanshu_sabharwal
Sudhanshu Sabharwal
November 27, 2025

bhkbkb

Gainsight Product manager
Inspiring
November 27, 2025

 perfect

Inspiring
November 27, 2025

Replace any line with high loop peaks that collect air.

Community Manager
December 2, 2025

Master cylinder push-rod free play: a hair of slack prevents port blockage.