Quick answer: Simple chain schedule: lube every 500 km, deep-clean every 1,000–1,500 km, check slack monthly, and replace when stretched. In the monsoon, clean and lube more often.

The schedule

• Every 500 km / after wet rides: lube.
• Every 1,000–1,500 km: deep-clean with a chain cleaner, then lube.
• Monthly: check chain slack.
• When worn: replace chain + sprockets — signs it needs replacing.

FAQ

How do I know it's overdue? Dry, grey, noisy or gritty = clean and lube now.