If your Classic 350 started with the choke on but then didn't start after riding it for a short distance and stopping, there could be a few possible reasons for this issue. Here are some troubleshooting steps you can take:
Check the fuel level: Ensure that you have enough fuel in the tank. If the fuel level is low, fill it up and try starting the motorcycle again.
Verify the choke position: Make sure the choke is in the correct position when starting the motorcycle. Typically, the choke should be on when the engine is cold and then gradually turned off as the engine warms up. Refer to your motorcycle's manual for specific instructions on using the choke.
Check the spark plug: A faulty spark plug can cause starting issues. Inspect the spark plug and ensure it is clean and in good condition. If necessary, clean or replace the spark plug.
Test the battery: Even though you mentioned that the battery was replaced recently, it's still worth checking its condition. Measure the battery voltage using a multimeter. If the voltage is low, recharge the battery or replace it if necessary.
Inspect the electrical connections: Ensure that all the electrical connections, including the battery terminals, are clean and securely tightened. Loose or corroded connections can cause starting problems.
Consider the carburetor: If the motorcycle still doesn't start, there may be an issue with the carburetor. It could be clogged or need adjustment. Cleaning the carburetor or having it checked by a mechanic might be necessary.
Seek professional assistance: If you've tried the above steps and the motorcycle still won't start, it's best to take it to a qualified mechanic or service center. They have the expertise and specialized tools to diagnose and fix any underlying issues.
Remember, these are general troubleshooting steps, and your motorcycle's specific model and condition might require different approaches. Always consult your motorcycle's manual or seek professional help if needed.