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@lynx
The article raises a few interesting and valid points, such as how long the bike has to meet regs. Using Cali rules is interesting as there was a time that air quality (certain pollutants? in the air )going in to an engine was higher than that coming out of the exhaust.
Would be a more interesting topic to chat about, when I have better concentration levels. Also pollution is not just the exhaust...
If you are really bored, there is lots of information about motorcycle emissions that the EU collected some from FEMA and those against motorbikes. It is very long, boring yet informative.