Yes, you can potentially use Thunderbird seats on your Royal Enfield Classic 350 to help alleviate back pain. The Royal Enfield Thunderbird models are known for their slightly different seating position and more comfortable seats compared to the Classic models. The Thunderbird seats are designed to provide better ergonomics and support for long rides, which can help reduce back pain and discomfort.
It's recommended to consult with a professional mechanic or authorized Royal Enfield service center to get accurate guidance and ensure that the Thunderbird seat can be successfully installed on your Classic 350.
Additionally, keep in mind that the seating position and seat design are just two factors that can affect back pain. It's crucial to also consider your riding posture, handlebar position, suspension settings, and overall riding habits. Maintaining a good riding posture, taking breaks during long rides, and performing appropriate stretches and exercises can also help in minimizing back pain.