So many of these bikes have such a high seat height that they sure aren't friendly for the average woman or asian. With electric mountain bicycles I'm finding the same thing. My girlfriend who also happens to be asian and just under 5 feet tall, can't find a decent bike that fits her. I think most motorcycles such as this are sold to white men who are old enough to have developed their careers and bank accounts to the level of being able to afford bikes such as these. That explains the old part. The culture of dirt bikes is certainly dominated by white men. James Bubba Stewart (dirt bike legend) is partly notable for being the first black rider to reach a high level in the pros. He also became arguably the most talented rider to ever ride a dirt bike.
I'm happy to say a similar lack of advertising to non whites has just recently been 'exposed' in an outdoor equipment sales company (MEC -mountain equipment coop) and they've decided to make a concerted effort to fix the bias.