What year did Honda change from timing belt to timing chain?

What year did Honda change from timing belt to timing chain? - 1

Why did they change to CVT from automatic?

You mean the other way around, cars have not had chains since the 70, s

Belts instead of chains started being used in the late 80's. Because if the break you are dead in the water but no damage is done to the motor. Unlike the chain, when it breaks it fouls up the inside of the engine.

Honda still uses a belt on their V6 engines. The 4 cylinder in the Accord changed from belt to chain in 2003. The 4 cylinder in the Civic changed from belt to chain in 2006