
The JT 420 HDR chain kit includes everything needed to replace the secondary transmission of your small motorcycle: 420HDR chain, standard front sprocket, and steel rear sprocket. Designed for lightweight engines, this kit offers a simple and effective solution for urban, leisure, and small trail use.
The 420HDR chain features reinforced links and treated pins, suitable for the demands of 50–125 cm³, pit bikes, and minibikes. The 420 pitch and 126 links make installation and adjustment easy. The clip-type attachment allows for quick intervention during replacement on the roadside or in the workshop.