Scooter front monoshock gas absorber YSS for Piaggio Vespa 50-125-150 Primavera/Sprint 2T/4T <2016. The shock absorbers YSS Top-Line are equipped with internal gas tank to linear and precise to ensure optimum cooling. Strength, precision and performance are also guaranteed by the steel stem and treated with low friction special Teflon and machining precision. The shock is adjustable for preload by turning the adjustment ring in the spring. Is designed and built to suit the specifications of the model on which it will be installed.