A Twist of the Wrist Vol. 2: The Basics of High-Performance Motorcycle Riding
by Keith Code

https://www.amazon.com/gp/product/0965045021

A Twist of the Wrist: The Motorcycle Roadracers Handbook
by Keith Code

https://www.amazon.com/gp/product/0965045013

The Soft Science of Roadracing Motorcycles: The Technical Procedures and Workbook for Roadracing Motorcycles
by Keith Code

https://www.amazon.com/gp/product/096504503X

Race Tech’s Motorcycle Suspension Bible (Motorbooks Workshop)
by Paul Thede and Lee Parks

https://www.amazon.com/Techs-Motorcycle-Suspension-Motorbooks-Workshop/dp/0760331405

How to Tune and Modify Motorcycle Engine Management Systems
by Tracy Martin

https://www.amazon.com/Motorcycle-Management-Systems-Motorbooks-Workshop/dp/0760340730