Harley Davidson

What are the emission and noise regulations as they pertain to Harley Davidson motorcyles?

I am a student at the Motorcycle Mechanics Institute. I am doing a presentation on the EPA standards and what Harley Davidson has done to meet them. I am doing a past, present, and future type outline. Any information/help would be greatly appreciated.
Thanks.
Ben

They pass all codes as delivered from the factory. If you put anything else on them, they will not pass the emissions or noise regulations.

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