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First Analysis | Historic kart: discovering the 1998 tony kart extreme chassis

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HISTORIC KART: DISCOVERING THE 1998 TONY KART EXTREME CHASSIS

The stickers on the floor tray speak clearly: World Champion 1998. This is the hallmark of Tony Kart Extreme that, indeed in 1998, won the World Championship Formula A with Davide Forè and Formula A with Rubens Carrapatoso. An historically important chassis, definitely worth an analysis by taking a walk down memory lane

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THE CHASSIS
BRAKE SYSTEM
ACCESSORIES
THE ENGINE
CATEGORY
TECH SHEET

Tony Kart Extreme chassis consists of mixed tubes with diameters that range from 30 to 32mm. The smaller size distinguishes the front of the Kart: front tube, front crossbar and the two longerons which connect the front part of the kart to the rear. All tubes in this area have a diameter of 32mm. Analyzing the frame’s design one notices, compared to modern chassis, the transverse tube which connects a “C” to the other one. The appearance is similar to that of a removable front bar, but the crossbar is in a fixed position, thus leaving no room for any adjustments. No maneuvering room for both “Cs” either, lacking the modern adjustment systems for the caster and camber. The only adjustment possible for the front is that of the height, to be modified through the use of classic spacers to be inserted underneath or above the stub axles.
Also the central part of the chassis, in the seat area, is not conventional: in the first homologation, dating back to 1997, the tubes formed two triangles on the sides of the seat larger than those in the photographed model (which was from 1999). Additionally, there was a single tube which crossed the chassis from left to right, in which it was possible to install the removable bar. In 1998, the second version of the chassis used a decreased size of the triangles, while the following year a double tube was installed below the front area of the seat. The tube, 32mm in diameter, allows for the possibility of inserting a removable bar that is flat and increases the stiffness.

THE CHASSIS
BRAKE SYSTEM
ACCESSORIES
THE ENGINE
CATEGORY
TECH SHEET

Amongst the accessories which make up a kart, today as yesterday, the brake system is without any doubt one of  the most important systems. Brakes are also some of most important items which have changed during the years along with the homologations, has considerably increased in performance as well as safety.
The Tony Kart Extreme while being analyzed mounts a hydraulic brake system characterized by a brake caliper consisting of two half-shells. The small pistons have a diameter of 28mm. The brake disc has a diameter of 210mm and has grooves which have the job of reducing the friction material of the pads,  thus improving their grip on the disc while braking. The system, a custom one of the Tony Kart at that time, mounts a two-piston pump which ensures the operation of the system even in the event of a pumping element breakage. The master cylinder is without a stroke recovery tank, therefore needing the insertion of spacers on the brake caliper, between pads and piston, in order to recover the millimeters that are used up with wear.

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