How To Bleed Dirt Bike Rear Brakes? [A Step-by-step Guide]


Bleed Dirt Bike Rear Brakes

Are you thinking about how to bleed dirt bike rear brakes? Bleeding dirt bike rear brakes are one of the routine work that you have to do. Bleeding dirt bike rear brakes is a very simple thing. It is not only simple but also essential. It can be done without taking any help from mechanics. Because you can do it by just following some steps.

With this info, you will know how you can bleed your dirt bike rear brakes. Also, what should you remember before working on brakes? In addition, here I have also given some answers to your questions. As far as I’m concerned, the answers provide you with a clear knowledge about bleeding.

Here I will give you a brief description of what I acquired when I bleed my dirt bike rear brakes. So to gather more information about the bleeding brakes of dirt bikes read the entire article attentively. 

4 Simple Steps To Bleed Dirt Bike Rear Brakes

Rear brakes are called drum brakes. The brakes are designed with more parts than disc brakes. Also, this type of brake is harder to service. However, the brakes manufacturing cost is less expensive. It is not only less expensive but also capable of an emergency brake mechanism. The brakes create friction to stop the car and wheel. 

To keep its responsive power active, sometimes you need to bleed the dirt bike brakes. Otherwise, the rear brakes lose their stopping power. So here I discuss a perfect guideline in 4 steps about how you can bleed your dirt bike rear brakes. To bleed your dirt bike rear brakes accurately you need to follow the below steps properly. 

Step-1: To Bleed Dirt Bike Rear Brakes

First of all, you need to clean your dirt bike, specifically around the master cylinder or brakes reservoir area. Because you should make sure that when you remove the filter cap, don’t get into the reservoir any dirt or muck. The dirt or muck can destroy your brake reservoir. Also, it can reduce the efficiency of bleeding. 

To keep the master cylinder level, with a center stand position your bike handlebars. Now the two Phillips screws are removed carefully. 

Then carefully remove the rubber diaphragm and the cap. Usually, it can be closed with a cap. So take care of it as if you don’t drop or get it dirty. 

Step-2: To Bleed Dirt Bike Rear Brakes

Now go to the bike front wheel of the brake caliper. From the bleeder nipple remove its protective rubber cap. Over the bleeder valve nipple according to size to fit snugly use a clear piece of plastic tubing. So that you can transform accurately. It is important to take a perfect size of tubing. 

The bleeder nipple should be long enough so that the catch bottle sits on the floor to drain. If the nipple isn’t long enough, it’s going to be tough to drain properly. For this reason, you should take a bleeder nipple that is long enough. 

In the catch bottle, put a little amount of tea brake fluid so that it can remove air from the system. Because the air reduces bleeding efficiency from the system. So you should ensure that the bottom of the catch bottle is submerged in the brake fluid. Otherwise, you can find brakes soft after bleeding. 

Now you need an open-ended spanner. It fits on the bleeder nipple hex nut. 

Step-3: To Bleed Dirt Bike Rear Brakes

To make this step easier, you need to take help from a second person. Tell him to squeeze the front brake lever holding it several times.  

While the lever keeps on pressure, turn the bleeder valve a quarter to loosen. From the bleeder, the valve should exit old brake fluid and a small amount of air to make the tube clear. And then the lever will move to the handle. 

To create pressure on the lever, tighten the bleeder nipple. Until the old fluid and air are out of the system, you should repeat the process. Because of that old fluid, air can damage the effectiveness of the brakes. And stop the process when you see new brake fluid come out. 

Throughout the bleeding process, keep topping up and keep an eye on the brake fluid level of the reservoir. Without spilling, you can add a little amount of brake fluid with a small plastic syringe. 

The whole process that you have to start again if the air is sucked in and all the fluid is consumed at the master cylinder. 

When filling the reservoir be careful that no small contaminants get into it. Because they can reduce the bike brake bleeding efficiency. Whether you have to repeat this procedure a few times or a lot of times depends on how much air is in the system.

Until the bleeder valve comes out, clear brakes fluid with no air bubbles. You should keep bleeding.  

Step-4: To Bleed Dirt Bike Rear Brakes

When the dirt bike bleeding process is completed, restore the brake action. Then install the open cap and diaphragm carefully. 

Now refit the nipple protective runner cap and double-check the bleeder valve is tight. Otherwise, the bleeding will become unsuccessful after a few days. 

After completing the process, you must see if the process is completed properly. For this reason, you can use three methods. First of all, roll the dirt bike backward and forward. Second, tightening the forks. Third, if possible make a test ride. 

With those 4 steps, you can bleed your dirt bike brakes properly. However, you have to maintain instructions step by step properly. Otherwise, you may face break destructions and unsuccessful bleeding. Following the same process, you can bleed the front brakes. So with this process, you can bleed the rear brakes and front brakes of a dirt bike. 

After one or two rides, the problem persists and the brakes become spongy. And following the steps, if you can’t solve the problem, you need to go to a local bike shop. Maybe a professional service is required to solve the problem. 

However, while you bleed your brakes, you are concerned that the system has no old brake fluid and air. Also, You have to make sure you maintain the steps properly. 

If you don’t remove old brake fluid and air after bleeding, you will find your dirt bike brakes still soft. To properly come out from bleeding, you need to repeat the process again and again until you see the clean brake fluid.

Some Extra Tips To Keep In Mind When Bleeding Dirt Bike Brakes

These tips will help you to smooth dirt bike bleeding.

  • With WD40 spray, the reservoir cap screws. Because sometimes screws become so tight. This makes it difficult to open the screws. If you spray this, you will overcome the problem. 
  • After bleeding, if the brakes still provide poor performance and spongy feelings that means there is still air and old brake fluid in the system. Then reverse bleeding is required. You can do it using a rubber tube and a syringe by connecting with the bleed nipple. Reverse bleeding can solve the problem. If still not solved,  you need to take help from a professional mechanic. 

What Should You Consider Before Working On Dirt Bike Brakes? 

To start with, the brake system doesn’t attempt service if you are nervous to work. Because not being able to act properly can be counterproductive. That means damage to the brake system.

Moreover, before working with the brake fluid make sure you are wearing eye protection. Because the brake fluid is made with the hyper chemical. Also, you should consider the below things. 

Cleanliness: 

Cleanliness is the first thing that you should make sure of before working on a dirt bike brakes system. To find the best result of the bleeding operation, you have to clean the motorcycle first. For this reason, before opening a bleeder or removing the master cylinder cover, it is important to have a clean motorcycle. 

Selection Of Brake Fluid: 

To consume brake fluid on the dirt bike brakes system, you should remember two things: First, consume that brake fluid which is recommended by the manufacturer, and second, the brake fluid must come with a new or unopened container. 

You can find your original type of brakes fluid on the master cylinder cover or specific service manual cards. You have to consume that brake fluid which is preferred for your dirt motorcycle. Otherwise, it causes damage to seals. As a result, you will find a loss of braking abilities on your motorcycle.  

Reuse Of Brake Fluid: 

If fluid leaks out during bleeding, do not reuse this fluid anymore. No matter how clear it is. Because that fluid is not safe for your dirt motorcycle brakes. It loses its effectiveness when it comes in contact with air.   

Brakes fluid will absorb airborne moisture when it crouches in the reservoir or an opened container. Because the fluid is hygroscopic. For this reason, you should periodically replace the brake fluid. However, make sure every time you use brake fluid from a new or sealed container. 

Take Protection: 

When using fluid on brakes, it can cause harm to your skin and bike. Because the fluid is created with a pretty bitter chemical. To protect your skin and bike proceeds needed precautions before starting bleeding. Such as safety glass for eye protection and rubber gloves for hand protection. 

The fluid also can damage plastic and strip paint. So to protect from slippage,  wrap around the master cylinder with a soft rag. 

Above all, before applying brake fluid on a dirt motorcycle, you should remember those things for safety. Those are things you need to maintain for proper use. Otherwise, you may face trouble. Now let’s drive into how you can bleed your dirt bike rear brakes. 

As I mentioned before, when you bleed dirt bike brakes, you should remove old brake fluid and air from the system. Because those things reduce the system’s effectiveness. By the way, don’t worry, the bleeding process of dirt bike brakes is very easy, you can do it by yourself. 

Related Questions On How To Bleed Dirt Bike Rear Brakes:

Why Doesn’t The Dirt Bike’s One-Wheel Or Caliper Bleed Brakes Fluid?

The dirt bike’s one-wheel or caliper doesn’t bleed brakes fluid for caliper fault. That is caused by sliding pins. Occasionally these pipes are damaged. For this reason, brakes create holes and leak the fluid. As a result, the rear brakes don’t bleed air and create powerlessness in the rear brakes. 

Bleeding a bike is the most important thing. So, you should bleed your dirt bike by maintaining accurate steps. Bleeding can protect your bike from damage. So, you should bleed your bike timely and accurately. 

How Long Does It Take To Bleed Dirt Bike’s Brakes?

Mainly the bleeding time depends on the type of dirt bike size. The dirt bikes usually take 5-8 pulls to fully charge the system. You can see for yourself when it gets stiffer and the pedals turn faster than before. 

You should apply the bleeding process again and again until you see clear brake fluid in the system front layer. However, it is not possible to say exactly how long the whole process will take to complete. It will depend on your brake system. 

How Do You Gravity Bleed Dirt Bike Brakes?

Bleed dirt bike rear brakes by gravity, it is a long process. The process kills a huge time to complete. This process highly works on all modern cars. 

To bleed by gravity, first of all with new brakes fluid fill the master cylinder reservoir. Then loosen the bleeder screw of the brake caliper/cylinder. Leave it like this for about an hour. After that top off of the master cylinder and close the bleeder screw. With this same process bleed your other dirt bike brake. 

What Is The Best Way To Bleed Dirt Bike Rear Brakes?

There are 4 ways to bleed dirt bike rear brakes. However, the best way to bleed dirt bike rear brakes is two-person manual bleeding. You don’t need any specialized tools to do this process. However, you need to take help from another person to play the process.

The advantage of this process is that you can bleed your dirt bike brakes at home. The process has just 4 steps to complete. In the content above I told you the process. So read the article carefully and try this way. 

What Happens If You Don’t Bleed Dirt Bike Brakes? 

Bleeding the brakes is a must for smooth dirt bike riding and taking care of the bike. If you don’t bleed the bike brakes, you may face some dangerous things. The brakes lose the power of responsiveness.

You may experience a spongy brake. Without brakes, you can’t ride a dirt bike or any other type of bike. If you don’t desire to face those problems, keep bleeding brakes when needed. 

Why Are My Dirt Bike Brakes Still Soft After Bleeding?

If your brakes are soft after bleeding that means there is still air in the system. Because air reduces the efficiency of bleeding. With two steps, you can remove the air from the system: First, remove the caliper, and second, move it around and place it where it will solve the problem. If you can confirm the system has no air, then the problem is solved. You should do it to take proper benefits of bleeding. 

After Bleeding, Why Does My Brake Pedal Go To The Floor? 

During the brake bleeding process, the piston sticks in the bore of the master cylinder. For this reason, after bleeding the brakes pedal goes to the floor. It happens when manually the brake system blends. So you should take care of it. 

If you strictly follow the instructions of the dirt bike brakes bleeding process, you don’t face troubles anymore. Above I mentioned how you bleed your dirt bike rear brakes. Also, with this process, you can bleed your dirt bike front brake. 

Is Better Reverse Brakes Bleeding? 

For single brake bleeding,  reverse brake bleeding is the best method. With this process, you can remove air from the system effectively. For its bleeding screw, the reverse process works well with any vehicle including ABS-equipped vehicles. The firstest and quick bleeding process is reverse brakes bleeding. Hence, it can be called that reverse brakes bleeding is better than any other bleeding. 

Final Verdict:

In this blog, I have given you the best guidance on how to bleed dirt bike rear brakes, providing the most valuable information that is what you should do for safety before starting bleeding. 

Bleeding the brakes is a very simple thing. You can bleed your dirt bike rear brakes with easy 4 steps. Also, by following the above instructions, you can bleed your dirt bike front brakes. Don’t forget to try this process. If you try this process, let me know in the comment section.

Md. Saifur Rahman

Dirt bike riding was a fascination for Saifur since he was a child. Later that fascination turned into a passion and his profession. Apparently, it may seem that tips and tricks are useless for bike riding sometimes, but you may find them really useful after reading his blogs. Saifur is a regular rider.

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