Tony Kart presents the new chassis: Racer 401R, Krypton 801R and Rookie EV. Tony Kart presents the new chassis: Racer 401R, Krypton 801R and Rookie EV. Bas Kaligis / Monday, December 24, 2018 0 24117 Article rating: 4.4 Now the last developments of the top range Tony Kart chassis are official. The models Racer 401R and Krypton 801R for Ok and KZ, and Rookie EV for the Mini. All the chassis have a new graphic and some improvements on the components. For the Rookies also the frame has been modified and the brake system has been redisgned. Read more