Description: 100% brand New Starter Motor Clutch Gear Assembly for Honda WH100 SCR100 GCC100 Match equipment exactly for a perfect fit, easy to install. Center Shaft Diameter: 8 mm; Outer Diameter of Bottom Gear: 38.7mm Please check for the details and make sure this is the right one you need. Specification: Size: as the picture shown Fitment: for Honda WH100 SCR100 GCC100 Package Includes: 1 Piece Starter Gear Assembly