Interesting read from here:
http://www.roadandtrack.com/motorspo...ctually-means/
And in the comments section:
ยง 86.1854-12
Prohibited Acts
(b) (5) Certified motor vehicles and motor vehicle engines and their emission control devices must remain in their certified configuration even if they are used solely for competition or if they become nonroad vehicles or engines; anyone modifying a certified motor vehicle or motor vehicle engine for any reason is subject to the tampering and defeat device prohibitions of paragraph (a)(3) of this section and 42 U.S.C. 7522(a)(3).
By us they passed a law requiring seat belt usage, said it would never be the primary reason to pull anyone over. Now they allow seatbelt usage as the reason t pull vehicles over.
But you can still ride a motorcycle here with only a speedo and some sunglasses on, no safety equipment nor mufflers required!