1. Advertise bike. Take good pictures, include any upgrades, list general maintenance history/schedule. Short and sweet. No one wants to read a wall of text.
2. Respond to inquires quickly. Don't get worked up when the lowballs roll in. Just say no thanks.
3. Show the bike to potential buyers. Make sure it's clean, battery charged up, has gas in it etc. Depending on your comfort level you can do this in your driveway or others prefer to meet in a public location
4. Go through the negoations and hopefully reach an agreement.
5. Purchase used vehicle package (some buyers want to see this before agreeing to buy. Personally I'll buy the package when I have a deal) complete included bill of sale. Fill out the back of the vehicle side of the ownership (left side) so the buyer can transfer it. Keep the right side of the ownership (plate portion) and remove and keep with your plate.
6. Collect the money and watch a couple guys load up a bike that haven't loaded a bike before. Good times.
Some people like to go to the MTO to notify them that you no longer own the vehicle. I don't do this. What I do is complete a 2nd bill of sale that will be my copy and it will be dated and marked paid in full. If something happens down the road this is my proof I no longer owned that vehicle. Decide what your comfortable with.
7. Cancel insurance and start shopping for a new bike.