Feature: 420 represents the chain model, 15T is the number of gears, 17mm is the size of the mounting hole. Please verify the model number and size prior to ordering to ensure this is the correct part for your motorcycle. Directly replace the old worn gears to make the motorcycle works normally and is easy to install. Specification: Material: Steel Color: Titanium Tone Eye to Eye Center Length: 30mm/1.18" Mounting Hole Diameter: 17mm/ 0.67" Gear Inner Diameter: 14mm/ 0.55" Sprocket Size: 64x6mm/ 2.52"x0.24" (H*T) Spacer Diameter: 17mm/0.67” ; 15mm/0.59" Screw Thread Size: M6x1.0 Application:Universal fit for motorcycle, such as for Honda 50cc 70cc 90cc 110cc 125cc Dirt Pit Bike Mini Bike ATV with 4 wheelNotice:Please allow the product may have an error of 1-3mm.Package Included: 1 x Front Sprocket 2 x Spacer 4 x Screw
