NCY 1200-1012 Yellow 1500 RPM Compression Spring for the Yamaha 50 2T, C3, Jog and Minarelli 50 Scooters Fitment: Yamaha 50 2T, C3, Jog and Minarelli 50 Measurements: Wire Diameter: 4 mm Inner Diameter: 44 mm Length: 108 mm 1500 RPM Engagement Yellow