your big engine builders made the push for the clones,, flatheads were on the way out, everyone had animals, they were so reliable they only seen the motors back every year or so for a rebuild, some every two years and they had no work. along came the clones, they put up alot of money to build the class, had enough clout to have the rules changed often to make mandatory rebuilds to run them. they fail often,, loah and behold, they jack the price sky high and are making tons, why do you think the big engine guys sponsor most big races. and have the big boys on their motors,, they get 1200 for a 300 dollar motor, they bring or highly suggest the tech men at the big races, and once again loah and behold, they never fail tech and they keep selling them. you get a so so motor for your buck. so when a new lower cost class comes along. and they start selling fewer motors, they will push the next big thing in karting. lower the cost. never show up for a big race you can't win, let the track owners start losing and then have low cost saturday night races. will that happen no.