Need opinions on clone heavy class

[Horsepower]

Starting a kart series for pro-clone, 375 lb weigh in for kart and driver. Need opinions if there should be a weight limit on the driver. Would letting drivers that weigh less than 200lb (but weight 375+ in kart) be an "unfair" advantage?

 

[racing promotor]

No not at 375 lb, when you go to X-Heavy at 400lb or 420ln kart and driver then Ya driver should weigh 200lb Min.