There could be several reasons why your Honda Hornet 160R makes a noise and leans to the left in certain situations. Here are a few possible explanations:
Loose or worn-out parts: Check if any components, such as the handlebar, grips, or mirrors, are loose or damaged. Vibrations caused by hitting potholes could exacerbate the issue and cause noise. Loose parts can also contribute to the bike leaning to one side when you remove your hands from the handlebars.
Suspension issues: The noise and leaning could be related to problems with your bike's suspension system. Faulty or worn-out suspension components can lead to a bumpy ride and unstable handling. Inspect the fork tubes, shocks, and related components for any signs of damage or wear.
Wheel alignment: Improper wheel alignment can cause the bike to lean to one side and affect its stability. If the alignment is off, it could also contribute to the noise when hitting bumps or potholes. Ensure that both the front and rear wheels are aligned correctly.
Tire pressure: Incorrect tire pressure can impact the bike's stability and handling. Check the tire pressure regularly and ensure it is within the recommended range specified by the manufacturer.
Steering head bearings: The tuk tuk noise could be due to worn or improperly adjusted steering head bearings. These bearings allow the handlebars to turn smoothly. If they are damaged or loose, they can create noise and affect the bike's stability.
Given the nature of the issue, it would be advisable to have your bike inspected by a qualified mechanic or Honda service center. They will be able to diagnose the problem accurately and provide the necessary repairs or adjustments to ensure your bike is safe and performs optimally.