Pair of rear gas shock absorbers for Piaggio MP3 400 (2007-2013) scooters. YSS gas shock absorbers are equipped with an external emulsion gas reservoir with reserve for precise linear movements and to guarantee excellent cooling. Resistance, precision and performance are also guaranteed by the stem in chromed steel treated with low friction, details in teflon and high precision machining. The YSS shock absorber can be adjusted in preload by acting on the spring adjustment ring. YSS shock absorbers are designed and built to adapt to the specifications of the model on which they will be installed.