Pittsburg (AP) - Creeping around outside his North Side home with his .357 Magnum pistol still smoking, Ralph Zelik bumped into two policemen. He figured the best thing to do was confess. "I just killed my motorcycle." Zelik, 34, admitted. Nearby lay the cycle, with five slugs in it. At a hearing, Zelik told the magistrate the shooting followed an argument with his wife over the motorcycle. The charges were dismissed. The magistrate said Zelik had inflicted no harm. . .