The most common cause of a belt breaking on a Harley Davidson is wear and tear over time. Belts naturally deteriorate with use and exposure to the elements and can become weak and brittle, making them more susceptible to breaking.
2. Improper Tension:
Incorrect belt tension can also lead to premature belt failure. If a belt is too tight, it can put excessive stress on the belt and cause it to break. On the other hand, a belt that is too loose can slip and cause damage to the belt and surrounding components, eventually leading to a break.
3. Misalignment:
Improper alignment of the belt drive system can cause the belt to rub against other components, resulting in wear and eventual breakage. Misalignment can occur due to worn or damaged pulleys, misaligned engine components, or improper installation.
4. Oil Contamination:
Harley Davidson belts are made of rubber and are susceptible to damage from oil and grease. If the belt comes into contact with oil or grease, it can cause the rubber to deteriorate and weaken, making it more prone to breaking.
5. Excessive Heat:
Exposure to excessive heat can cause the belt to become brittle and weak. This can occur due to prolonged riding in hot conditions or due to a malfunction in the cooling system, causing the engine to overheat.
6. Manufacturing Defects:
Although rare, manufacturing defects can also cause belt failures. These defects can include weak spots or flaws in the belt material that make it more susceptible to breaking.
7. Belt Idler Bearing or Tensioner Failure:
The belt idler bearing or tensioner plays a crucial role in keeping the belt in place and maintaining proper tension. If these components fail or malfunction, it can lead to improper belt tension or alignment, increasing the likelihood of a belt break.
Remember that it's crucial to refer to the specific Harley Davidson model's service manual for belt replacement intervals and maintenance guidelines to ensure optimal performance and longevity of the belt drive system.
