Warners revved up fan frenzy for “Torque’s” Jan. 14 bow with a motorcycle demo outside the Chinese theater but the preem didn’t really kick into gear until star Ice Cube was in the house.Helmer Joseph Kahn, a musicvid making his feature directing debut, stressed that “Torque” is not a glorified musicvid. “It’s a high speed action flick that takes bike riding to another level,” he said. Ice Cube didn’t make the after-party, but other revelers were in fine spirits at the Spider Club. Thesp Martin Henderson, who said he wanted to bring humor to his tough guy role, showed his lighthearted side, making merry with fellow partygoers. Also on hand: pic’s Monet Mazur, recording artists YoungBloodz and Heath Ledger.