This class used to be called Junior Intercontinental A (JICA or ICA-J) and has changed since January 2007 when CIK-FIA decided to replace the 100 cc air-cooled two-stroke engines with 125 cc Touch-and-Go (TaG) water-cooled two-stroke engines (KF type).The engines produce 26–27 hp (19–20 kW).
Minimum weight is 145 kg, including kart and driver.
It is one of the highest kart classes with national championships (perhaps with different tyre rules).
The Junior Monaco Kart Cup is taking place each year in this format.
The class was subsequently renamed OK-Junior, standing for Original Kart.