First of all, it depends on the bike that you ride, if you're riding 70cc bike and pushing it to 80-100 kph, then absolutely you're doing wrong both for the bike and yourself.
Secondly, even riding bikes 'kheench kr' is not a good idea at all provided its not the safest of the rides on the road. So, be careful and ride with care without pushing the limits.
Still, I'm not your mother so the rest is your choice.
I hope it helps.