Why did the sons split from their dad on American chopper?

The sons, Paul Jr. and Mikey, split from their dad, Paul Sr., on "American Chopper" due to ongoing conflicts and differences in creative vision and management style. Tensions escalated over the years, particularly surrounding the design process and the direction of their business. Ultimately, the split allowed Paul Jr. to pursue his own vision for custom motorcycles, leading to the establishment of his own shop, Paul Jr. Designs. This separation highlighted the struggles of balancing family dynamics with business relationships.