What are the motorcycle sprockets?
2 Answers
Motorcycle sprockets are toothed flywheels that connect the chain between the engine and the drive wheel. The function of toothed flywheels: They transmit the engine's power to the drive wheel, and the different tooth ratios of the front and rear sprockets affect the vehicle's torque and top speed. Method for replacing the small chain: Generally, when replacing, it is necessary to remove the timing sprocket cover on the cylinder head, remove the magneto, and take off the timing sprocket to remove the small chain. Some also use a special chain breaker to disconnect the small chain, disconnect the new one as well, connect them, pass them through, then remove the old chain and reconnect the new chain as it was. This method is commonly used for scooters where chain replacement is more troublesome.
As an ordinary motorcycle rider, I was also curious about the 'big and small flywheels' before - they're actually the general terms for the front and rear sprockets. The small flywheel (front sprocket) is installed on the engine output shaft, while the big flywheel is connected to the rear wheel's drive section. Having replaced them several times myself, I've found that the size ratio of this gear pair directly affects the riding experience. For example, if the front sprocket gets smaller or the rear sprocket larger, the gear ratio increases, providing more power for climbing hills and acceleration; the opposite configuration increases cruising speed. However, during daily commuting, choosing improper sizes can easily cause chain loosening or noise generation, requiring regular checks of chain tension and lubrication - otherwise, sudden chain slippage can be dangerous. I've also encountered cases where friends randomly changed specifications leading to increased fuel consumption. My advice for beginners is to maintain factory settings initially and consult professional shops about compatibility when necessary.
