Aftermarket What's The Difference Between Honda Aftermarket Dirt Bike And Regular Honda Dirt Bike?

What's the difference between Honda aftermarket dirt bike and regular Honda dirt bike? - aftermarket

From what I understand, are the motorcycle aftermarket always done with all parts of the Honda? It's almost like dirt with a "reform" Honda bike? In the same way they sell "refurbished" iPods, cameras, cell phones, etc.? Or more to it?
A field of 150 cc Honda motorcycle suspension still has the same strength, durability and strength than a simple 150cc Honda?