All motorcycles of 280cc or larger, manufactured in 2000 or later will be subject to biennial smog checks if legislature currently being considered by the California State government is approved.
The legislature – which would effectively target illegally modified exhaust systems (eg. y removing the catalytic converter or using straight-through pipes – would come into force in 2012 if approved by Governor Arnold Schwarzenegger, a motorcyclist himself.
According to the California Air Resources Board, bikes account for 3.6% of vehicles registered in California, but account for 10% of smog-forming emissions. The ARB estimates that 5.2 tons of pollutants would be prevented from entering the atmosphere daily if motorcycle smog checks become law.
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