80Km/h is handsome speed on a 70cc
how much more you want?? 
Also be careful when doing 80Km/h. It is a little too much for such light weight bike.
Today i was enjoying cruising at 80 on my GS when a 70CC started racing with me :P. I ignored him for a while but he kept pushing along with me, spoiled my sakoon mahool cruising mood, i had to rev to 90 for a while to tell him that he isn't even in the race
i slowed down after showing him while he kept pushing at 80 few meters ahead of me. Just after a Km , i noticed he barely avoided a collision with an upcoming rikshaw because of stupidly overspeeding.
May Allah keep us all protected on road.