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One of the new features of the 2025 World Superbike season is the introduction of fuel flow restriction. With the arrival of 850 cc engines in MotoGP, scheduled for 2027, Dorna and FIM wanted to work on reducing the performance of the bikes.
For this very reason, starting this year, the initial limit in fuel flow for all manufacturers is set at 47 kg/H with a tolerance of two grams per lap over the limit.
The initial idea was to establish a value in relation to the manufacturer, then it came to deliberating a single one. Many are wondering what will change?
First, the engine configuration as well as exhaust and intake will have to be redone. In addition, the bikes will be equipped with an Allengra ECU that will signal how much fuel will enter the combustion chamber. Therefore, more than the fuel put into the tank, what will become decisive is how much fuel will reach the cylinders.
As a result of the decrease in fuel, performance in delivery and acceleration will then be reduced, so the bikes will take longer than before to get to maximum performance.
Obviously there is a lot of curiosity to see what will happen and at the same time whether the on-track form factor will be the same or not. As of today, however, no one knows, because the adjustment device will be tested for the first time only at the Phillip Island tests (Monday and Tuesday), so as a result teams and riders will experience this new development only at the last moment.
The feeling, however, is that manufacturers with lower engine revs such as Yamaha could benefit from it unlike other competitors, remembering, however, that from this year engine revs will be free, with no more constraints.
