Bika, 32, left his Kogarah home earlier this month in preparation for a fight against an unknown opponent in the US, likely on December 3.

The move comes as Bika battles inactivity, having not fought since his loss to Andre Ward for the WBA Super World super middleweight title in the US last November.

Now the former IBO super middleweight champion wants to mount another title charge.

Despite his inactivity Bika is still rated the No. 5 super middleweight in the world by the IBO.

He knows time is ticking on his chances of winning another world title.

"This fight is important," Bika said.

"I can't muck around because if I do and lose in the US, then maybe it's over for me.

"I don't want to risk myself to go there and lose the fight. Winning the fight can bring me a big opportunity."

Bika has suffered because the world's best super middleweights have been tied up with the Super Six World Boxing Classic tournament.

The tournament reaches its climax when Andre Ward and Carl Froch battle for The Ring, WBA amd WBC super middleweight championships on December 17.

He had hoped to fight super six contestant Glen Johnson midway through this year before the fight fell through. "I'm always in the gym training and people ask why I'm in there because I don't have a fight," Bika said.

"If you take four weeks off in boxing, it takes too long to come back the way you were. Maybe one day I'll get a phone call to be ready within four weeks and if I'm not training, it's impossible to have a fight.

"Boxing is my job."