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What Causes the Rear Brake of a Motorcycle Not to Retract?

3 Answers
MacDaniella
09/05/25 2:54am
Here are the reasons why a motorcycle brake may not retract: 1. Reason one: The brake rocker arm shaft is rusted, or the brake cable is rusted, or the brake shoe block is excessively worn. 2. Reason two: The brake wire is damaged, the brake pedal or handle is deformed and stuck, or the lower brake pump has too much dirt or is deformed. Below is additional information on related content: 1. Brake: Braking, also known as stopping, refers to the action of stopping or reducing the speed of a running locomotive, vehicle, or other means of transport or machinery. 2. Composition: A motorcycle is a two- or three-wheeled vehicle driven by a gasoline engine and steered by handlebars, known for its lightweight and agility, rapid movement, and widespread use in patrol, passenger and cargo transport, as well as a sports apparatus. Broadly speaking, motorcycles are categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring bikes.
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ElliottLynn
09/17/25 3:33am
I've been riding motorcycles since I was young and have experienced several instances where the rear brake wouldn't return, mostly due to issues with the brake cable or hydraulic system. For example, the cable could rust and get stuck, preventing it from springing back, or the springs in drum brakes might age and break. In hydraulic systems, too little brake fluid or air entering the system can cause the piston to stick and not return to position. The last time I cleaned the caliper pistons, I found that accumulated dust caused them to stick, but a few sprays of brake cleaner improved the situation. However, this is no small matter—delaying repairs can lead to brake failure, making it dangerous to control speed while riding. I recommend checking the brake's travel before each ride. If it feels stiff or returns slowly, avoid riding and take the time to thoroughly inspect the system. Cleaning and lubrication can prevent 90% of issues. Once you develop this habit, failures become rare, making riding much safer.
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DeJosephine
10/31/25 4:05am
I love DIY car repairs, and when the rear brake doesn't retract, I troubleshoot step by step: First, pull the lever to test the feel—if it's stiff, the cable might be stuck, and applying some lubricant can help. For hydraulic systems, check the fluid reservoir; if the level is too low or air has entered, bleeding is necessary. Once, I encountered a worn master cylinder piston causing poor return, and I fixed it by replacing the O-ring myself. Safety comes first during DIY—prepare clean rags and standard tools to avoid oil leaks or part damage. It's best to perform simple brake maintenance regularly, like lubricating moving parts every six months and quickly testing the retraction before riding. Saves money and hassle—don't wait until it breaks down to fix it.
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What causes the ABS light to illuminate in a Sylphy and how to troubleshoot it?

ABS light illumination can occur in various states, with different causes and solutions for each state. Details are as follows: State 1: ABS warning light remains constantly illuminated (most common). Cause 1: The ABS wheel speed sensor's sensing area is covered by dirt, mud, or other contaminants, affecting its ability to detect the corresponding speed signal. This prevents the ABS control unit from determining the vehicle speed and calculating wheel slip rates, thus failing to issue appropriate commands for brake adjustment. Solution: Clean contaminants from the wheel speed sensor and adjust the gap between the sensor and the signal ring to restore normal function. Cause 2: Poor signal transmission due to loose system wiring connections or faulty ABS relay contacts. Solution: Inspect wiring connections and reconnect any loose terminals. State 2: ABS warning light illuminates intermittently, turning off during acceleration. Cause: When multiple electrical components are in use, battery voltage drops below 10.5V. The light extinguishes when engine speed increases and voltage rises. This may also indicate insufficient power supply voltage to the ABS system due to poor terminal contact or grounding issues. Solution: Check battery specific gravity; inspect charging system; examine power supply components (such as voltage relays or poor power connections). State 3: ABS warning light remains illuminated after engine start until engine IGFF position. Cause: Poor grounding connection of ABS hydraulic valve body; faulty wiring harness connector of ABS hydraulic valve body; ABS control unit malfunction. Solution: Loosen and retighten the hydraulic valve body ground screw, cleaning contact surfaces if necessary; check for enlarged connector gaps; replace ABS or ABS/ASR control unit. State 4: ABS warning light illuminates during high-speed driving. Cause: ABS control unit detects excessive speed difference between rear and front wheels; incorrect tire specifications or incorrect wheel rim specifications. Solution: Verify proper tire and wheel rim specifications according to vehicle requirements, referencing the label near the fuel filler cap. State 5: ABS warning light illuminates intermittently. Cause: Improper brake light switch adjustment; internal contact failure in brake lights. Solution: With engine running, depress brake pedal and manually push the brake switch linkage downward completely, then release pedal to complete self-positioning; replace brake light switch if necessary. When the ABS warning light is illuminated, it's recommended to avoid continued driving. An illuminated ABS light indicates malfunction in the anti-lock braking system. During emergency braking, locked wheels may cause loss of vehicle control and skidding, preventing the driver from decelerating or adjusting vehicle trajectory, posing significant safety risks.
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