The definitive answer:
Motorcycle insurance rates (for the basic coverage of $200,000 Third Party Liability) are based on the displacement of the engine (not what is written on the side of your motorcycle on a shiny decal).
The rates are based on these "groups," which each attract their own premium:
110cc and less
111 to 400cc
401 to 750cc
751 to 1150cc
Over 1150cc.
The greater cubic centimeters of engine displacement, the higher the rates.
That's for the basic. If you want to add Collision, Comprehensive or Specified Perils (please, DO NOT buy specified perils, it's not worth the premiums), *those* rates are based on the amount of insurance you want to buy, in dollars. Thus, $5000 of insurance (assuming your motorcycle is worth less than $5000, is less expensive than $30,000 worth of insurance on your motorcycle, to cover you for losses by Collision, or Comprehensive.
The rates are based on the extent of coverage desired.
The one and only place to get the exact premiums (because there's license fees on top of rates) is at an ICBC agent. Walk in and ask them, they'll punch it into their computers and tell/show you exactly how much.
And, they *should* be giving you advice on what kind/how much insurance to buy, based on your individual circumstances.