What are the reasons for the poor braking performance of motorcycle drum brakes?

1 Answers
LondonAnn
07/30/25 8:42am
Motorcycle drum brakes may fail to provide adequate braking for the following reasons: 1. The brake pedal may bend due to a fall or collision, shortening the effective length of the lever arm and reducing the amplification of braking force. 2. Incorrect installation can lead to diminished secondary amplification of braking force. 3. Worn brake shoes can cause the brake cam to rotate at a larger angle, altering the direction of braking force transmission and reducing the lift effect, thereby failing to effectively transfer braking force to the shoes, further weakening braking performance. 4. An uneven surface inside the brake drum can result in insufficient contact area with the brake shoes. 5. Misalignment between the brake shoes and the drum, either due to excessive clearance or improper assembly, can cause eccentricity.
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