'Catch' all kinds of 'diseases' of disc brake systems on motorbikes

Disc brakes are a fairly common braking system on motorbikes today because of the advantages that disc brakes bring that are much better than other types of brakes. Therefore, if in the past motorbikes used drum brakes for both wheels, now most motorbikes on the market use disc brakes for the front wheel and drum brakes for the rear wheel, or both disc brakes for both front and rear wheels.

Although disc brakes are said to have many advantages such as precise braking and short braking process, they also have many failures that make braking inaccurate. It is worth mentioning that most people often do not pay much attention to them, or even ignore them, until they encounter problems on the road.

Below are common problems with motorcycle disc brake systems:

1. Brakes make a loud noise

This is a very common situation. When driving normally, it's fine, but when you brake, the brakes make quite a loud noise, much louder than usual, and you can even hear the sound of metal rubbing against each other.

If you make a loud noise when you squeeze the brake, it may be because the brake pads are worn.

Reason:The brake pads wear out, causing the brake disc to collide with the brake pad frame, causing loud noises, and even no braking effect.

How to handle: Of course, the only way to handle this case is to replace the brake pads immediately to avoid scratching the brake disc.

2. Push the bike, do not use the brake, there is a screeching sound from the brake

This condition is quite common, can be found in most vehicles using disc brakes. That is when driving, even when pushing a motorbike and not using the brakes, but there are screeching sounds.

Push the motorbike and do not use the brakes, but hear some screeching noises.

Reason: Because the disc brake is placed in an "exposed" position, it is very easy to get dust, dirt, and water when moving on the road. Or it could be because the brake disc is bent or warped, causing some parts to rub against the brake pads and cause noise.

How to handle:To handle this, you should spray water strongly to wash away sand and mud from the brake system, then wipe it dry, this situation will be fixed. In case the brake disc is bent, you need to replace the new brake system for the motorbike.

3. The brake is clamped to the brake disc and cannot be separated.

This is the situation when you have been driving for a long time and suddenly one day you find the brakes are stuck, even though you did not apply the brakes. There is no way you can release the brakes to make the car go faster.

Worn brake pads and calipers will also cause the brakes to not work effectively.

Cause: The brake fluid is out or has been used for too long and has lost its effectiveness, causing the piston to not be able to push in, and therefore the brake pads stick to the brake disc.

How to handle:In case of brake fluid, you need to replace the brake fluid for the motorbike. You need to ask the mechanic to remove all the old brake fluid from the tray before pouring in the new fluid.

4. Brakes are stuck, brake feel is not real

This is a phenomenon when you drive and feel the brakes are tight, causing the car to go slowly, and when you squeeze the brakes, it doesn't feel real.

Brakes are clogged with dust and oil seals on both upper and lower pistons that have expanded due to long-term use.

Cause: The brake disc is warped. You can check with your eyes by putting the center stand down, then pressing the rear of the bike down so that the front wheel does not touch the ground, then using your hand to turn the wheel and observe. You should replace the brake disc when it is warped to protect the brake pads, clutch and save fuel.

Brakes locked

The dust and oil seals on both the upper and lower pistons swell due to long-term use or water gets into the brake fluid, causing the piston to jam. The weak return spring does not push the brake lever back to its original position, causing the fluid to not return. The pitted brake piston also makes the brake easy to jam, leading to brake lock.

Poor quality brake pads, when driving (usually downhill), continuously applying the brakes causes the brake pads and brake discs to overheat and stick together, which is also the cause of brake lockup.

How to handle:Depending on the cause, you have appropriate solutions, specifically: Replace the brake disc if the disc is warped; Clean the dust seal; Replace the new brake spring; Replace the new piston system; Replace better quality brake pads.