Could be wheel balance.
It is possible that the tires are out of balance. Any reputable tire dealer can check the balance for you.
The S2000 is faster and is governed at 138 mph. The Honda Accord is governed at 120 mph.
I have a 97 accord, Mine runs normally at 2000RPM's. At 70 MPH it goes up alittle above the "2" on your tachometer. Hope this helps you.
666.6 mph
They can go about 150 mph
allignment
120 mph.
Top speed is 120 mph.
You will feel the car vibrate around 50-80 MPH
because that's its top speed
About 100 mph
check cv axles, transmission, and tires.