Mods and upgraded parts for your Kawasaki Ninja 400 from MOTO-D Racing. Proven racetrack upgrades and parts on sale to make your bike better. Whether you’re looking to increase speed, reduce weight or add performance, these parts will help you improve the ride. The Kawasaki Ninja 400 replaced the Ninja 300 and became a class-leading entry level motorcycle that is sporty, easy to ride and great on track. As part of Kawasaki’s Ninja lineup, the Ninja represents the pinnacle of speed and precision. Upgrade today with parts from MOTO-D Racing and receive fast shipping, cashback rewards and knowledgeable customer support from riders like you.