The Racer represents the winning spirit of Tony Kart. Since 2004, the various evolution of this model have collected 9 world titles (two of them, in OK and KZ, won in 2021) and several other international titles in all categories. The new 401 RR has the task of continuing this successful story and to do so it introduces several new features and product refinements. Above all, the new M10 fairing kit and some technical details that aim to improve the driving position. Aesthetically, the new sticker kit and the M7 number plate spoiler, are now in green. On the other hand, the cornerstones of the philosophy at the base of the whole project remain unchanged: top quality materials, technologically advanced processes and constant development carried out on the basis of the information gathered by the Tony Kart Racing Team in the most important international competitions. 

Like its predecessor, the single-speed Racer 401 RR is also equipped with the BSD braking system. This system, signed by OTK Kart Group, is the same one fitted on the karts winners of the OK and OKJ 2021 and 2020 world titles. The one-piece forged rear brake caliper, equipped with a stroke recovery system, features two Ø 34.5 mm pistons and is combined with a two-piston brake pump as well as to the brake line with outer cover stainless steel braid, PTFE inner tube. The caliper and the brake pump are made of Ergal, a material that stands out for its excellent mechanical resistance, which is further increased by the hard oxidation process that reduces wear on the moving parts. 

For several years, OTK Kart Group's R&D department has been focusing its attention on the aerodynamic refinement of its products, through CFD computer simulations and in-depth wind tunnel tests. This work initially led to the introduction of the M7 number plate spoiler, with its innovative design and ability to reduce aerodynamic resistance, resulting in increased performance. The M7 is now combined with the new M10 fairing kit to further refine the aerodynamic profile of the Racer 401 RR. The weight-saving side bumpers have been streamlined to aid rear tyre cooling. In addition, the front spoiler and the rear protection, adjustable in width, meet the latest FIA regulations. Not to forget is the "integral" floorplate, already featured on the previous Racer 401 R model, which further improves aerodynamic efficiency. 

The driving position is a fundamental aspect for every driver and, for this reason, OTK Kart Group's R&D department works constantly to implement continuous improvements in this concern, refining even the smallest details. In particular, with the Racer 401 RR it is possible to adjust the footrest with more flexibility, furthermore new seat supports have been introduced. Unchanged, instead, is the high grip steering wheel, already present in the previous 401 R, equipped with high grip and comfort rubber grips, which considerably improve the driving sensibility while driving. The steering wheel is combined with an angled hub for a fully ergonomic driving position. 

The constant improvements at the centre of the daily working philosophy at the OTK Kart Group, examines and improves every aspect and every single component of the kart. The Racer 401R in particular, sees the introduction of the new steering wheel which is a high-grip wheel that is also designed to give maximum sensitivity and feel to every driver. Complimenting the new wheel is the inclined steering wheel boss, which allows the steering position to be adjusted to suit each individual driver. 

• Wheelbase: 1040mm
• Rail Diameter 30mm
• Axle Diameter: 50mm
• Ride Height Adjustment: Front & Rear
• Torsion Bar: Front (Removable & Adjustable)
• Twin Master Cylinder Self Adjusting Brakes