During the monsoon, check your bike's engine oil and use the manufacturer-recommended viscosity to ensure proper lubrication. Inspect the air filter after riding through muddy or wet roads and replace it if clogged. Tyre tread is crucial for grip on wet roads; replace tyres with worn-out tread or cracks. Regularly clean and lubricate the chain to prevent rust caused by rainwater. Also, check brake pads and discs for wear or rust, and ensure the fuel cap is sealed to avoid water entering the fuel system.