Harley-Davidson began incorporating belt drives into some of their motorcycle models starting in the early 1980s. The transition from chain drives to belt drives was primarily motivated by several factors:
Reduced maintenance: Belt drives require less frequent maintenance compared to chain drives. Chains need regular lubrication, adjustment, and replacement, while belts typically last longer and don't require as much attention.
Quieter operation: Belt drives produce less noise compared to chain drives, offering a smoother and quieter riding experience.
Cleaner operation: Belt drives do not require lubrication, unlike chains, which can result in oil or grease splatter. This leads to a cleaner motorcycle and reduces the chances of dirt and debris sticking to the drive system.
Power transfer efficiency: Belt drives offer excellent power transfer efficiency, similar to chain drives, ensuring that the engine power is efficiently transmitted to the rear wheel.
While belt drives have many advantages, they also have some limitations. They are not as durable as chains, especially under heavy loads or high torque situations. Belt drives are typically more suited for cruiser-style motorcycles, where the emphasis is on smoothness, comfort, and reduced maintenance, rather than high-performance or off-road riding. As a result, Harley-Davidson has continued to use belt drives in various models to cater to these specific preferences of their riders.