Yes, motorcycle brake fluid can go bad over time. Brake fluid is hygroscopic, which means it has the ability to absorb moisture from the surrounding air. As moisture enters the brake system, it can lead to a decrease in the fluid's performance and overall effectiveness.
Here are a few reasons why motorcycle brake fluid can deteriorate:
Moisture absorption: As mentioned, brake fluid absorbs moisture over time. This moisture can lower the boiling point of the fluid, leading to reduced braking performance and an increased risk of brake fade under heavy or prolonged braking. Moisture can also cause corrosion within the brake system, potentially damaging critical components.
Contamination: Brake fluid can become contaminated by particles, dirt, or debris that enter the system. Contaminants can affect the fluid's ability to flow properly and may cause damage to seals, pistons, or other components within the braking system.
Age and degradation: Even without moisture or contamination, brake fluid can degrade over time due to its chemical composition. Over time, the fluid may break down, leading to a loss of its desired properties such as viscosity and lubrication.
To maintain optimal braking performance and ensure your safety, it is important to regularly inspect and change the brake fluid according to the manufacturer's recommended intervals. This interval typically ranges from every one to two years, depending on the type of brake fluid used and the motorcycle manufacturer's guidelines.
If you notice any signs of deteriorated brake fluid, such as a darker color, cloudiness, or a spongy feel when applying the brakes, it is advisable to have the brake fluid flushed and replaced by a qualified technician. Regular maintenance and proper care of your motorcycle's brake system will help maintain reliable and effective braking performance.