If this were a younger team, a more immature team, or a team coached by a guy with manic tendencies, the Pistons would be in full panic right now.
  But they are not.
  "We have to stay positive," veteran Cliff Robinson warned after the Pistons lost their fourth straight on this West Coast trip, 83-81 Friday in Portland. "This is a time when you could easily splinter. We have to stay positive and understand that this is just a bad stretch of road games."
  It would be a gross exaggeration to say the wheels have come off, but the statistics tell a worrisome tale.
  In the four losses before the trip's finale Saturday against the Sonics, the Pistons averaged 86 points, 10 fewer than their output before the trip. They have made 41 percent of their shots, down from 47 percent before the trip.
  They have been outrebounded by more than 10 a game (43). They have been outscored at the free-throw line, 83-47. Opposing teams have made more free throws than the Pistons have attempted (65).
  In addition, one of the Pistons' primary assets, the three-pointer, has dried up. They are 19-for-73 from three-point range in the last four games. In the four before that, they were 32-for-95.