At Norton Motorsports, the status quo is never good enough. We always push ahead. All of the top race exhausts for the Ninja 400 are developed for standard Supersport and Street Ninja 400 bikes with stock engines and 12,300 rpm rev limits.
But for World Supersport 300 and MotoAmerica Junior cup, the bikes are required to use a restrictor plate on the intake and a lower rev limit of 10,350.
For Rocco Landers’ MotoAmerica Junior Cup Ninja 400, we wanted more than what was currently available, so we custom built our own race exhaust that is optimized for the restricted WSS300 and MotoAmerica Junior Cup Ninja 400s, to squeeze out every last bit of power we could. Our Norton MGP Race Exhaust also weighs several pounds less than the alternatives, tucks neatly out of the way under the swingarm, where it is protected from crash damage, and meets sound restrictions for MotoAmerica Junior Cup and World Supersport 300. The exhaust includes an 18mm bung for wide band O2 sensor mounted just behind the collector for accurate dyno and autotuning.
After 9 straight victories since Round 2 of the 2020 season after installing our new exhaust, we are confident that we were successful and this exhaust is now available to everyone!