Shearer rose above Gianluca Festa in the penalty box to carefully place a header into the left-hand corner of the Middlesbrough net, giving Schwarzer little chance.
One of the bikes will return to the Harley-Davidson museum in Milwaukee, while the other will be auctioned off at the festa with proceeds supporting the Good Samaritan Foundation.
Capone five nominations included two nods for record of the year - for Rita's A Festa and Skank's Dois Rios - producer of the year, album of the year and best engineered album.