The 1.4 8v was dropped in 2003 as it would fail to meet future emissions requirements.

Due to emissions requirements, the 300 series engines were eventually retired.

However, some states only license motorcycles that meet emissions requirements.

This change was probably due to emission requirements in the US market.

That is also going to be the case for emission requirements for new vehicles.

Engine offerings were carried over from 1972 with revisions to meet the 1973 emission requirements.

As a result, the state has set emission requirements that have forced car companies to invent new technologies for pollution control.

Production changes and updates were made to keep the system current with the changing California and federal emissions requirements.

Today the United States has more stringent emissions requirements than anywhere else in the world.

The report's authors, in acerbic language, trace the making of the deal as state officials scrambled to meet federal emissions requirements.