“There’s no replacement for displacement” in racing but what about power? In particular what about peak power and where a bike reaches it?
For WorldSBK purposes, the peak power of an engine is defined as the rev limit on the production machine, plus 3%.
Calculating this takes a little bit more math, as it requires you to average the rev limit from both the third and fourth gears, and then once this has been established, the FIM typically add an extra 3% to that RPM figure.
The rev limits are defined at the start of the championship season, but they aren’t set in stone for the duration of the championship. They can be changed at the discretion of organisers as the year progresses.
Having been introduced to much fanfare 12 months ago, the new limits are of interest again in 2019 because we have new bikes on the grid. The most newsworthy new machine is the headline grabbing Ducati Panigale V4 R, but it should be noted that Kawasaki, BMW and Honda also have newly homologated bikes, and thus also new rev limits.