None of my springs are actually broken, but they don't feel all that strong. Should I replace them with new springs?
Yes. All springs have a lifespan. They are a wear item just like a brake pad or an oil filter. After time they will wear out and lose their ability to do their intended job. As a spring expands and contracts, the steel they are made from starts to fatigue. Eventually the fatigued steel will simply fail. If you notice your solo seat
springs feel weak, it is a good indicator that they need to be replaced.