01/07/2025
The KF experience officially ended around10 years ago (at the end of 2015) and was replaced by an engine that is moresimple and closer to the origins of the non-shfiter categories (hence the OKdenomination, an acronym for Original Kart) to give new impetus to what was theTop Class of karting only to then, inexorably, fall into decline. The fundamental problem of KF (2007/2015) was of a troubled beginning, due totechnical problems definitively resolved only at the moment in which this regulatory cycle came to a close. Among the problems, in the first place, the centrifugal clutch, visibly undersized and with unjustifiably expensivecompared to the frequency of its replacement, which gave enormous problems. Itwas a one-piece expansion-type with 3 friction pads: a solution to be discarded, given the excellent efficiency of the Horstman-type disc clutches successfully used in the 100 Junior. Another problem was wiring and cabling,also extremely expensive, delicate and often the cause of missed starts at most inappropriate times. In KF2, equipped with a exhaust throttle valve, the functioning of the valve was often a source of problems on some engines due to the manufacturers’ inexperience in this delicate sector, with the incorrect positioning of the vacuum intake in the crankcase and problems of locking ofthe guillotine both for design errors and for an excessive quantity of lubricant used on single-speed engines equipped with a cast iron cylinder liner, someone even missing the angle of the guillotine to the exhaust pipe. Allthese factors led drivers to opt for and choose other categories, especially atthe national level: after a timid beginning, the KF disappeared from the minorraces and was replaced by the single-brand trophies. The CIK FIA thus decided totake what good there was in KF, eliminating at the same time the most complicated solutions and harbingers of problems, ten years later we can saythat was a successful idea: we now have a top Class, where drivers don't stay long enough, but that’s another story..