The new kart project Rookie 4 Shift and ID Engines from Arthur, Indy and Milan Dontje are doing well! Recently a collective test was held on the go-kart track in The Netherlands and at the Italian kartingtrack of Adria the world premiere of ID Engines, (named after Indy Dontje) took place during the international kart fair in Adria. The first four-stroke shifterkart-engine made a huge impression on the kart fans! Indy Dontje tells more about the concept.