I think as long as the motor is in a class that allows for the modifications according to the rules and it techs properly there is no reason to have a claim out there. To have a great motor in a bigger class costs money. If someone wants to stay cheaper or race in a class where motors are even, then race in a crate motor class. But if you are racing in a class where engines cost decent money and you have competitors putting $30,000+ then you can't come up with $15k and buy them out just because you can't afford twice that. We use to have that rule in a traveling series when my son raced karts. If a kart was abnormally fast you could call a claim on the motor, but then it went to tech and got torn completely down. If it was legal, you paid for the rebuild and half the money you claimed it for and got nothing in return. I think anyone who has a solid legal motor would love to have someone claim their motor, rebuild it, and then pay them a bunch of money and not give anything up. I think it's an issue of people staying in classes they can afford and are comfortable in and not going up to classes they are just going to complain about.