well its a fact that chonda 70 cannot do speed above 95 according to its official manaul at least my dhoom says its top speed is 95km/hr.. very few times i have been able to reach 90 ( according to meter) but not above it .. and i am damn sure that 90 on meter wont be anything close to 80 on gps..
so dont mesmerize yourself by fake speed reading .. just chil and ride at max 70 meter speed for safety .. however 60km/hr is a bit more safe speed limit in my opinion on 70.