Feature: Centrifugal clutch 1″ bore 14 tooth designSuitable for 40-41-420 roller chain-up to 13hp horsepowerA high quality and professional clutchEngaging speed up to be 2300 RPMHigh impact, wear resistant that is super durableCommonly used on go karts, mini bikesUser-friendly controls for easy starting and operationSpecification: Material: IronPackage Dimensions: (13.77 x 4.33 x 4.33)” / (35 x 11 x 11) cm (L x W x H)Competiable Chain Size: #40/41/420Weight: 2.76 lbs / 1.25 kgClutch: 1″ Bore 14 Tooth Fitment: Go Kart Mini BikePackage Include: 1 x Centrifugal Clutch