This is the most widespread form of transmission
Tension and lubrication, the two points to check
Alignment should pose no problem if the tension is correct, so the two points to check are the tension and lubrication.
A chain is composed of links connected to one another and in case of harsh acceleration or gear changes, they are briefly subjected to a tension which gradually stretches the chain….So adjustments are required
When to change them
Immense progress has been made in chains over the last few years, and they last longer, up to 30 000 km, the figure having tripled in twenty years.
As for lubrication, the usual way: with the gearbox output sprocket and the drive sprocket mounted on the rear wheel, the chain is working in a metal-to-metal environment.