Question

Do motorcycles have chains? If not, why not? What are the pros and cons of using belts instead of chains?

Answer 1

Yes, motorcycles can have chains as part of their drivetrain systems. However, not all motorcycles use chains, and some may use alternative systems like belts or shaft drives. Let's explore the different options and their pros and cons:

Chains:

• Chains are a common choice for motorcycles, especially in sport bikes and off-road bikes. They are durable, efficient, and capable of handling high power output.
• Pros:
  1. Efficient power transfer: Chains have low power losses during transmission, making them suitable for high-performance motorcycles.
  2. Cost-effective: Chains are generally more affordable to manufacture and replace compared to other options.
  3. Easy to modify: Chains allow for easy customization of the gear ratios by changing sprocket sizes.
• Cons:
  1. Maintenance: Chains require regular lubrication and adjustment to maintain optimal performance and prevent wear. Neglecting maintenance can lead to premature stretching, decreased efficiency, and potential failure.
  2. Messy: Chains can get dirty and require cleaning, and the lubricant can fling off onto other parts of the motorcycle or riders' clothing.
  3. Noise and vibration: Chains can generate noise and vibrations during operation, which some riders find undesirable.

Belts:

• Belts are commonly used in cruisers, touring bikes, and some entry-level motorcycles. They are made of reinforced rubber and toothed to engage with the sprockets.
• Pros:
  1. Low maintenance: Belts require less maintenance than chains. They don't need lubrication, tension adjustments, or frequent cleaning.
  2. Clean operation: Belts do not produce as much dirt or debris, keeping the motorcycle cleaner.
  3. Smooth and quiet: Belts offer smoother and quieter operation compared to chains.
• Cons:
  1. Limited power capacity: Belts have limitations on power transfer capacity, making them less suitable for high-performance motorcycles.
  2. Less customization: Belts are not as easily modified for changing gear ratios as chains.
  3. Cost: Belts can be more expensive to manufacture and replace than chains.

Shaft Drives:

• Shaft drives use a shaft to transfer power from the engine to the rear wheel. They are commonly found in cruisers, touring bikes, and some adventure motorcycles.
• Pros:
  1. Low maintenance: Shaft drives require minimal maintenance compared to chains and belts. They typically only require periodic lubrication.
  2. Clean and enclosed: Shaft drives are enclosed, keeping them protected from dirt and debris while providing a clean appearance.
  3. Durable: Shaft drives are known for their durability and longevity.
• Cons:
  1. Weight and complexity: Shaft drive systems tend to be heavier and more complex than chains or belts, which can impact the motorcycle's performance and handling.
  2. Cost: Shaft drives can be more expensive to manufacture and repair than chains or belts.
  3. Limited customization: Similar to belts, shaft drives offer limited options for customizing gear ratios.

In summary, each drivetrain system has its own advantages and disadvantages. Chains provide high power transfer, affordability, and easy customization but require regular maintenance. Belts offer low maintenance and a clean operation but have limitations on power capacity and customization. Shaft drives are low maintenance, durable, and offer a clean appearance but tend to be heavier, more complex, and less customizable. The choice depends on the specific motorcycle's design, intended use, and the rider's preferences.