YSS ECO-LINE Vespa PX, T5 Front Shock AbsorberYSS EVO LINE Vespa PX, T5 Front Shock Absorber The G series front shock absorber made by YSS offer the rider a gas shock absorber at a reasonable price. The YSS Brand offers specifically built Vespa PX shock absorbers. body: silver spring: red spring pre load: continuously adjustable external fluid reservoir l 255 mm Comparison No. VK302 255T 03 858 (YSS)