Motorcycle brake master cylinder

Motorcycle brake cylinders are necessary for the conversion of mechanical force applied by a rider into the pressure of the working fluid. This pressure presses brake pads against the discs, which makes the vehicle slow down.

Types of motorcycle brake cylinders

Depending on the features of the design:

• With a fixed distance between the piston and the fulcrum of a brake lever. As a rule, the higher this parameter, the faster the system responds.
• With an adjustable distance between the piston and the fulcrum of a brake lever. Components of this type enable you, with the help of a switch, to choose an appropriate driving mode in compliance with the weather and road conditions as well as with rider’s individual preferences.

By location:

• Front. They are powered by a lever on the handlebar.
• Rear. They are activated by pressing the foot pedal.

Malfunctions: their causes and symptoms

• Scratches and other defects on internal walls. This malfunction causes reduced braking efficiency. Scratches often appear if the maintenance work on the unit was slipshod. In particular, dirt which gets into motorcycle brake cylinders leads to abrasive wear.
• Corrosion damage. It is a consequence of exposure to moisture which might get into the system together with the working fluid. As a result, your brakes will function intermittently.
• Cracks and other defects of seals. Due to these malfunctions, braking distance might become longer. A possible reason is not being careful with sharp tools while servicing the assembly.

Tips on how to maintain and replace motorcycle brake cylinders

• Manufacturers do not specify any definite lifetime expectancy. These components have to be replaced when as serious malfunctions occur.
• Before removing old parts, it is recommended to wash the bike thoroughly. This will help to reduce the risk of dirt getting onto new spares.
• While carrying out the work, be sure to wear protective goggles and gloves.
• In case brake fluid gets on any of the components, it is necessary to wipe it with a wet cloth as soon as possible. Otherwise, the element might get damaged.
• Before removing old seals, you need to remember their position or take a picture of them. Pay your attention to the direction of the working edges. New seals should be placed exactly the same.
• It is recommended to mount and dismount the seals with a thin screwdriver which doesn’t have any sharp side edges.
• After the unit maintenance is finished, fill the system with new fluid and bleed it.

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