Go to the bottom right corner of the first island (where Mikhail Faustin's house 
is in Grand Theft Auto 4). Go all the way down to the bottom until reaching the 
last house, then go three houses to the right. Go into the back garden to find a 
Go-Kart. Note: If it does not appear, go to the front door and return and it will
appear if you are at the correct house.