Drive chain 428-98 — a drive chain for Alpha and Delta mopeds. The chain transmits torque from the engine sprocket to the rear wheel. The numbers in the name are the pitch and the number of links.
Time to replace it if the chain has stretched, sags, is noisy, or has rusty links. Sprockets are replaced together with the chain. Replace the part on a cooled engine and a clean assembly so that dirt does not get inside.
