Do you make a value bet here $5.50 UB

Is checking the river here WAY too weak tight, I had a sick feeling that J/10 was slowplaying here, but this was after taking some bad beats and getting trapped with monsters at other tables all night. Do I get called by any hands I beat?


Ultimate Bet No-Limit Hold'em Tourney, Big Blind is t40 (7 handed) converter

Hero (t1640)
SB (t1520)
BB (t4335)
UTG (t2915)
MP1 (t1515)
MP2 (t1800)
CO (t1275)

Preflop: Hero is Button with 5[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, MP2 calls t40, CO calls t40, Hero calls t40, <font color="#666666">1 fold</font>, BB checks.

Flop: (t180) K[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, MP2 checks, CO checks, Hero checks.

Turn: (t180) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets t50</font>, MP2 calls t50, CO calls t50, Hero calls t50.

River: (t380) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, MP2 checks, CO checks, Hero??