Many riders confuse the owner’s manual with the service manual. The owner’s manual tells you how to operate the bike and when to change the oil. The tells you how to rebuild the engine, adjust the carburetor jetting, set the ignition timing, and troubleshoot electrical gremlins.

Before diving into the technicalities of service manuals, it is important to appreciate the engineering of the CD 100. Launched in the 1980s as a joint venture between Hero Cycles of India and Honda of Japan, the CD 100 was a revolution. It offered a staggering fuel economy of over 80 km/l at a time when two-stroke motorcycles ruled the roads but guzzled fuel.