check out this link:
http://www.amadirectlink.com/legisltn/laws.asp

not all states require turn signals, some only require one mirror. living in iowa, technically i don't legally have to have turn signals on my bike. that means i could get rid of them and that ugly rack. if it doesn't sell, i may just do that. interestingly also was there is no law on exhaust decibels except for off-road areas.