How do you rebuild a motorcycle rear master cylinder?

How do you rebuild a motorcycle rear master cylinder?

How do I rebuild the brake master cylinder on my motorcycle?

1. Step 1: Remove the master cylinder.
2. Step 2: Remove the rubber boot.
3. Step 3: Remove the circlip.
4. Step 4: Take out the piston and spring.
5. Step 5: Check and clean the cylinder.
6. Step 6: Fit the new seals to the new piston.
7. Step 7: Fit the new spring.

How do you rebuild a brake master cylinder?

Finally, check the return spring for any kinks or corrosion and replace if necessary. Before reassembling your master cylinder, coat the interior of the piston bore with brake fluid. Coat the piston cups with fluid. Make sure the return spring has the correct orientation before inserting the piston. Press the piston in as you reinstall the circlip.

How does gravity work in a master cylinder?

Gravity feeds brake fluid to the master cylinder, filling the space around two pistons, one for each circuit. At rest, return springs push the pistons to the back of the master cylinder, releasing all pressure from the brake lines. When the driver depresses the brake pedal, the brake pedal pushrod pushes on the primary piston.

What should I do if my master cylinder is not working?

Sinking Pedal: When the driver steps on the brake, it should depress to a certain point and stay there. If the pedal continues to drop, it could indicate an internal brake fluid leak. Before condemning the master cylinder, check brake fluid level and check for external leaks from brake lines, calipers, or wheel cylinders.

How are brake calipers and master cylinders related?

The “master” cylinder distributes this pressure to the brake calipers or wheel cylinders, also known as “slave” cylinders. At the slave cylinders, hydraulic pressure is converted back to linear motion and force, to compress brake pads or expand brake shoes.

How to rebuild a motorcycle brake master cylinder?

Drop the spring and piston into the cylinder body, making sure they go in the correct way around. Hold the plunger down then insert a new circlip into the groove inside the body of the master cylinder (the TourMax kits from Wemoto come with them).

Sinking Pedal: When the driver steps on the brake, it should depress to a certain point and stay there. If the pedal continues to drop, it could indicate an internal brake fluid leak. Before condemning the master cylinder, check brake fluid level and check for external leaks from brake lines, calipers, or wheel cylinders.

Gravity feeds brake fluid to the master cylinder, filling the space around two pistons, one for each circuit. At rest, return springs push the pistons to the back of the master cylinder, releasing all pressure from the brake lines. When the driver depresses the brake pedal, the brake pedal pushrod pushes on the primary piston.

What causes low brake fluid in a master cylinder?

Low Brake Fluid: While leaks at brake lines, brake hoses, wheel cylinders, and brake calipers commonly result in low brake fluid, they are usually easier to identify because they are more exposed. External master cylinder leaks can be hard to identify because the only leak point is at the rear, which is often hidden in the brake booster.