I found the info below at:
and it indicates that the seller is responsible for providing the documentation that you need to establish that you are the bonafide owner of what you bought. If the seller is not willing to provide this information, then perhaps the bikes are stolen property and can never be registered in Ontario. I suggest you back away from this deal unless the UVIP is provided with the bikes, and not "Yeah, I'll bring you the UVIP on Thursday, just gimme the money now."
This is your tax dollars at work, and I suggest you follow MOT rules.
What is a Used Vehicle Information Package (UVIP)?
The Used Vehicle Information Package (UVIP) contains vehicle registration history in Ontario, including all present and previous owners in Ontario as well as the municipality of residence, odometer information, vehicle lien information (i.e. if there are any liens registered on the vehicle), the fair market value (Red Book) on which the minimum tax payable will apply and other information such as consumer tips, vehicle safety standards inspection, retail sales tax information and forms for bill of sales.
The private seller of a used motor vehicle is required to purchase a Used Vehicle Information Package. For most transfers of vehicles between private sellers, a UVIP is mandatory. Unless the types of vehicle and transfer situations are exempt, the seller is required to supply the purchaser with this package at the time of sale. The purchaser must then present the UVIP to the Driver and Vehicle Licence Issuing Office when transferring the vehicle registration. One example of an exemption to this package are transfers between linear family members (excluding siblings). Linear family members have been defined as father, mother, step-mother, step-father, spouse, grandfather, grandmother, son, daughter, step-son, step-daughter, step-grandson, step-granddaughter, grandson, granddaughter, mother-in-law, father-in-law, son-in-law, daughter-in-law. For further information on possible exemptions, please call ServiceOntario’s Driver and Vehicle Contact Centre at 1-800-387-3445 or in Toronto at 416-235-2999.
How much does a UVIP cost?
This package costs $20.00, payable by Visa, MasterCard, or American Express.
What information do I need to get a UVIP?
You need the vehicle identification number (VIN) or the licence plate number of the vehicle in question.
I already bought my car. Why do I need a UVIP?
By law, a UVIP is required to transfer ownership of an Ontario registered vehicle sold through private sale.