If you have a valid insurance policy then you are covered by (b) and won't be charged for no insurance:
Compulsory Automobile Insurance Act
Operator to carry insurance card
3. (1) An operator of a motor vehicle on a highway shall have in the motor vehicle at all times,
(a) an insurance card for the motor vehicle; or
(b) an insurance card evidencing that the operator is insured under a contract of automobile insurance, and the operator shall surrender the insurance card for reasonable inspection upon the demand of a police officer. R.S.O. 1990, c. C.25, s. 3 (1).
and procide such if checked, then you are ok, but the vehicle owner can be charged with:
The vehicle owner will most likely get charged for the lack of insurance on the vehicle:
Compulsory Automobile Insurance Act
2. (1) Subject to the regulations, no owner or lessee of a motor vehicle shall,
(b) cause or permit the motor vehicle to be operated,
on a highway unless the motor vehicle is insured under a contract of automobile insurance. 1994, c. 11, s. 383; 1996, c. 21, s. 50 (3).
With no sticker, you the driver, may get charged for:
HTA 7(4)(a) No person shall drive a motor vehicle on a highway unless,
(a) there exist a currently validated permit for the vehicle
And, of course, as there is no insurance policy covering the motorcycle, then it will get towed/impounded as noted above.
Hopefully the plate was originally registered to the owner/vehicle - there are additional charges for using an incorrect license plate....