If you don't change the fork oil in a motorcycle as recommended by the manufacturer, several issues can arise over time:
Reduced Suspension Performance: Fork oil plays a crucial role in damping and lubricating the motorcycle's front suspension system. Over time, the oil can become contaminated with dirt, debris, and moisture, leading to a decrease in its effectiveness. As a result, the suspension's ability to absorb bumps, provide stability, and maintain control may be compromised. The ride quality may deteriorate, and you may experience excessive bouncing, poor handling, or reduced braking performance.
Increased Wear: Fork oil also lubricates the internal components of the front forks, including the fork tubes, seals, and bushings. If the oil breaks down or becomes contaminated, it may lose its lubricating properties, leading to increased friction and wear on these components. This can result in premature wear, leaks from damaged seals, and potential damage to other suspension parts.
Damaged Fork Seals: Fork seals are crucial for preventing the fork oil from leaking out and keeping contaminants from entering the suspension system. If the fork oil becomes old or contaminated, it can cause the seals to deteriorate, leading to oil leaks. Once the seals are damaged, the fork oil may start to leak onto the fork tubes, which not only affects suspension performance but can also damage the fork tubes themselves.
Safety Risks: Neglecting fork oil changes can have safety implications. Reduced suspension performance can affect your ability to control the motorcycle, especially during emergency maneuvers or while riding over uneven surfaces. The compromised handling and braking capabilities may increase the risk of accidents. Additionally, oil leaks from damaged seals can create a hazardous situation by reducing traction and making the front end of the motorcycle unstable.
To maintain optimal suspension performance, ensure the longevity of your motorcycle's front forks, and ride safely, it is essential to follow the manufacturer's recommendations for fork oil changes. The specific interval for changing the fork oil may vary depending on the motorcycle model and usage conditions, so referring to the owner's manual or consulting a qualified mechanic is advisable.