YINETTECH 10Pcs Motorcycle Crankshaft Half-moon Keys 12.5x5x3mm Compatible with Vespa V50-125 PV ET3

The scooter engine key is compatible with Vespa V50/V90/V100/V125 Primavera/ET3 models. It directly replaces worn or damaged original keys, preventing timing issues and engine misfires. The crankshaft half-moon key measures 12.5 mm (length) × 5 mm (width) × 3 mm (height) and perfectly aligns with the crankshaft keyway. This ensures accurate timing of the flywheel/camshaft gear and prevents rotational slip under load. The crankshaft Woodruff key offers excellent shear strength and withstands vibration without deformation—critical for maintaining accurate engine timing in two-stroke applications. The crankshaft locating key made of steel. The rounded edges prevent stress concentration that could damage the crankshaft during high-rpm operation. The 10pcs engine half-moon key set supports multiple rebuilds or fleet maintenance.