Help me extract the maximum...

[vieira10]

This is early in a MTT and I have no reads on any of my opponents. I feel like I played this too weak and left some chips on the table. What would other players out there do to try and gain an extra bet or two?

(Note: I usually raise AK pre-flop, but I decided to limp this time to try and randomize my play a little.)

Here's the hand:
Party Poker No-Limit Hold'em Tourney, Big Blind is t50 (9 handed) internettexasholdem.com

Button (t1493)
Hero (t2190)
BB (t220)
UTG (t1120)
UTG+1 (t1785)
MP1 (t1805)
MP2 (t660)
MP3 (t1160)
CO (t3727)

Preflop: Hero is SB with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls t50, MP1 calls t50, MP2 calls t50, <font color="#666666">2 folds</font>, Button calls t50, Hero completes, BB checks.

Flop: (t300) 8[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">Hero bets t125</font>, UTG+1 folds, MP1 calls t170, MP2 folds, Button calls t170, Hero calls t45.

Turn: (t810) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, MP1 checks, Button checks.

River: (t810) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, MP1 checks, Button checks.

Final Pot: t810

[Slap My Jack]

Bet more.