My brother was a long time TO motorcycle cop. After motorcycle cop, he went to communications.
He tells me that without HIGHLY extenuating circumstance... like HUGE danger to the public, they won't chase a motorcycle. Too many times the budding Rossi turns the bike into a baby killing missile.
... and cops need permission from the communications sergeant to chase. He tells the story of chasing some guy on the 427, telling the sergeant he was travelling at 110kph, when he lost grip of the microphone, which is now blowing in the wind behind him... at 165kph. He got the guy when he crashed into a guard rail. No hard feelings though, my brother bought the crashed bike off the guy.
If you're getting chased by the helicopter, head for the airport. The heli can't get clearance to enter the airport air space, and the airport is federal land, so it's RCMP territory.
If you're getting chased by a car, DASH and hide.