It is difficult to determine the exact cause of the noise without hearing it firsthand or inspecting the motorcycle in person. However, it is possible for certain motorcycles, including the Honda Hornet 600, to produce some noise when the engine is cold, especially related to the clutch. This can be attributed to factors such as cold oil or components taking time to reach their operating temperatures.
Clutches can make slight noises due to the clutch plates engaging or disengaging, especially when they are not fully warmed up. However, it is important to note that excessive or unusual noises should not be considered normal and may indicate an underlying issue. To ensure the noise is within normal operating parameters, it is recommended to have a qualified mechanic or technician inspect the motorcycle before making a purchase.
If you have concerns about the noise or the overall condition of the second-hand Honda Hornet 600, it's best to seek an independent inspection or consult with a trusted mechanic who can provide a thorough assessment. They can listen to the noise and evaluate the bike's condition to give you a more accurate understanding of whether the noise is indeed normal or if it requires further attention or repairs. It's always advisable to be cautious when purchasing a used vehicle and to seek professional advice to make an informed decision.