Motorcyclist magazine has been posting some pointers and good how-to videos. Here's an article on when the pavement turns to gravel/dirt. Follow the link for more. Happy reading/viewing.
http://www.motorcyclistonline.com/dirt-riding-tips-for-street-motorcyclists?con=TrueAnthem&dom=fb&src=SOC&utm_campaign=trueAnthem%3A+Trending+Content&utm_content=596c61a200bd470007621553&utm_medium=trueAnthem&utm_source=facebook