Yep but the r is for restricted 500 so they are reducing it power out put by reducing the fuel input it's already happening. It's not about reducing the cc to 250 it's about using the abundance of lower cost 500cc engines available
In recent times the Speedway Control Bureau members have discussed the for's and against's introducing a new class to the British Youth Championship of the 500cc Restricted Class known as 500R.
The 500R is where motorcycles with a 500cc engine use a 27mm carburetor restrictor which reduces the power to the level of a 250cc engine.
The main goals for introducing this class is improve safety, lower costs and easier for riders to learn.
The 500R engines have more torque at lower RPM's which makes the bike smoother and more stable to ride.
Reducing the power with the restrictor does not effect the stability of the bike, ensuring the safe and smooth riding even for beginners.
The 500R engine will last longer than a 250cc engine which reduces maintenance and repair costs, and with more 500R available on the market, this makes them cheaper for riders to buy.
500R motorcycles allow riders to move smoothly from Youth to Senior classes, after removing the restrictor, the engine can be used in full 500cc racing.
Riders can use the same bike at different stages of their careers, which saves money on new equipment, the diameter of the carburettor can be easily checked by the Machine Examiner.
Therefore based on this information and with all of British Speedway trying to introduce more riders at the same time of keeping the cost affordable, for the 2027 season the 500R class will be introduced to the British Youth Championship for riders between the ages of 13 years old to 15 years old.
As well as the 500R riders will have a choice to compete in the British Youth Championship in the following classes - 500cc, 250cc, 125cc/150cc