YSS Racing Adjustable Rear Shock for 50cc – 170i Genuine Buddy Adjustable Performance rear shock for Buddy 50 and 125. Built of precision machined alloys. Spring preload adjustment with ring nuts of top of spring. Improve your ride drastically!YSS is one of the most prestigious motorcycle suspension manufacturers in the world. We are proud to carry their scooter line at a stock replacement and a performance level.Measures 11 inches eyelet to eyelet.Progressive Spring