I lived in Houjie for 8 years, finally left in 2014 to move back to the USA. You need to be careful where you ride, certain times the police can be pretty strict about the motorcycle ban. I suggest you head North East towards Heyuan or North West towards Shaoguan. There are plenty of great roads in those areas. Riding around Dongguan sucks, but things get better as you head north past Zengcheng.