This photo was taken at the practice day of Suzuka 8-hour endurance race. The team came to Japan from France, “YAMAHA FRANCE GMT94 MICHELIN YAMALUBE”.
The engineer was trying to adjust the motorcycle to the track condition. In the next few hours, temperature would go down slowly and some shower was expected.
Every team were trying wide variety of setups for the 8-hour endurance race on this practice day. However, it is impossible to forecast the weather of the race day. So you never know whether what you do will be necessary for the race. In the worst case, you have to do what you have never tried in the practice.
What you really need is to catch the foreshadow of something unexpected and react quickly.