Japan world cup 3 racer 711/15/2022 ![]() Since 2016 the new generation of Original Karts (OK) machines have taken over from the old KF engines. All these karts have the technology in common of the 2-stroke engine. The FIA Karting categories at the world championships are now divided into three main families: direct-drive karts, gearbox karts and Superkarts. The 2010 edition was raced with KF2 karts where the engine rpm is limited at 15 000 rpm. In 2007, a change in regulations introduced the KF1 category carts, 125 cc karts equipped with electric starters, clutch and rpm limiters set at 16 000 rpm, to replace the Formula A karts. Before and after that period 100 cc direct-drive karts was the prevailing standard. In the 80s (from 1981 - 1989) the World Championship was raced with 135 cc Formula K karts.
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