DETAILS
TECH FOCUS In the shifter kart class, KZ is the queen category, while KZ2 is the initial category to approach karting with gears. Drivers often move from a very tutorial KF class to a more complete KZ class, which adds performance and the use of gears, preparing to the next step into Formula racing.
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INLET SYSTEM
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For both categories, the technical regulation sets maximum displacement to 125 cc, with bore around 54 mm, and requests reed valve inlet system with 30 mm maximum diameter carburettor.
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MATERIALS Composite materials (such as Carbon, Kevlar or Glass fibers), suspension systems and differential systems cannot be used, neither in KZ nor in KZ2.
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WEIGHT The minimum weight limit is for both categories equal to 175 kilograms (kart plus driver).
NUMBERS In both KZ and KZ2 each driver will be entitled to submit to scrutineering the following equipment: two chassis of the same make, two engines of the same make.
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TIRES On the performance side, a difference is given by tire make, which is Bridgestone (Medium/Prime) in KZ, and LeCont (Medium/Prime) in KZ2.
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Braking system must be hydraulic and is free in KZ, as long as it complies with specific technical prescriptions, while in KZ2 the system must be homologated. The system has to act on all four wheels with a single control given by the braking pedal. Drivers have the possibility to regulate the balancing of the braking between front and rear tires by acting on a control on the brake pump.
SHIFTER SYSTEM Shifter system and gearbox must be CIK-FIA homologated and can have from three to six gears but is actually six gears on all engines. In KZ2 the gearbox control is mechanical, while in KZ it can be also electromechanical.
BRAKING SYSTEM
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FUEL The FIA World Motor Sport Council has decided to designate, for KZ and KZ2 categories, PANTA as the exclusive supplier of fuel (KART RON 102 type) to be used by each Driver.