It describes how to adjust fuel and ignition timing while keeping the stock ECU (Motronic) alive.
Mainly, the open loop (large throttle opening) is set by the ECU's ROM, while the closed loop (small throttle opening) is adjusted by spoofing the O2 sensor.
The stock ECU is flexible to short and long term environmental changes, but the closed loop is lean (AFR 14.7) due to environmental regulations, and the key is to make it rich and then balance it.
The first four chapters describe general tuning trade-offs, methods for understanding the current state of the motorcycle, and the operation of stock ECUs.
Only the methods are disclosed, not the specific settings. Due to customization, aging, and other differences in motorcycles.