Our 125 shifters and tags YES. Tag because they are over 100cc.
Not everyone runs a 140 mph kart. LOL
Some of the best drivers in the past had NO 4 wheel brakes at all and were awesome drivers!!! I do AGREE that SOME karts need dual systems but I also see where SOME don’t. It does seem to be more spins, etc with EVERYONE having dual systems them back in the day when only rear brakes was mandatory. Some racers need to learn to DRIVE!! We are not drag racers if you catch my drift!!