The cost of changing a pillion seat into a wide seat with a backrest for your Royal Enfield Classic 350 can vary depending on several factors, including the brand, quality, and customization options you choose. It's best to contact authorized Royal Enfield dealers or specialized motorcycle customization shops to get an accurate quote based on your specific requirements.
Generally, the cost of a wide seat with a backrest can range from around $100 to $500 or more. The price can increase if you opt for premium materials, custom designs, or additional features like cushioning, integrated storage, or adjustable backrests. Keep in mind that the cost of installation, including any modifications or alterations needed to fit the new seat, may also be factored into the overall price.
To get an exact cost estimate and ensure a high-quality and compatible seat, it's recommended to visit a reputable dealer or customization shop that specializes in Royal Enfield motorcycles. They can provide you with options, prices, and professional advice based on your preferences and budget.