Why fight it? The cost of mounting a defence in NY state would obviously be much higher that the cost of the ticket. What is your motivation to contest it?
Read the section on Demerit points for out of province convinctions. It seems there are consequences if you get a ticket in the state of Michigan or New York...I got a speeding ticket in Ohio a few years back, I paid it, and it did not affect my insurance or driving record one iota. http://www.mto.gov.on.ca/english/dandv/driver/demerit.shtml