My comments are not about SKUSA’s claiming rule per se but about engine claiming rules in general.
Claiming rules have come and gone several times in the history of kart racing and others. None have actually worked by my observation. Usually there seems to be some sort of “gentlemen’s agreement” that no engines will be claimed.
One other result that I have personally witnessed nearly becomes a conspiracy theory type of thing. It usually goes like this;
Race #1. Winner’s engine is claimed, winner refuses to let engine go and is disqualified and suspended.
Race #2. Winner’s engine is claimed, winner refused to let engine go and is disqualified and suspended.
By the 4th or 5th race of the season a quarter of the field is suspended and the rule fades into obscurity.