Description:Provide engine for your vehicalsPerfect replacement for your old or worn one and durablitySpecification:Material: MetalColor: As the pictures showSize: Bolt Hole Diameter: 6.5mm Bolt Hole Spacing: 79mm Shaft Length: 19.2mm Shaft Diameter: 11.2mm Number of Splines: 9 Overall length: 132.5mm Cable Length: 47.5cm Package Size: About 13.5cm(L) X 8.3cm(W) X 7.3cm(H)Fitment:Fits for 150cc and 125cc Chinese GY6 4-stroke engines QMJ152/157 QMI152/157Fits various unlisted makes/models, Tank, Roketa, Baja, Schwinn, Kazuma, United Motors, Matrix 150, VentoNote:No instructions. Professional Installation is highly recommendedPlease check the size measurement chart carefully before making paymentPlease allow 0.5-1 inch difference due to manual measurement(1 inch=2.54cm)The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understandingPackage Included:1 X Starter Motor