river betting

[jstoc]

PokerStars No-Limit Hold'em Tourney, Big Blind is t400 (9 handed) FTR converter on zerodivide.cx
I feel like this is a part of my game that is really weak. Is there any point to betting the river in situations like this?
I feel like if he has a busted draw he won't call, and if he was sandbagging I'm going to get raise, plus I'm saving myself the trouble of getting re-reraised all-in as a bluff, but still I feel like I may be missing some opportunities to pick up chips.

Thoughts?
Button (t6840)
SB (Villain) (t24455)
Hero (t35330)
UTG (t24230)
UTG+1 (t36209)
MP1 (t47237)
MP2 (t6650)
MP3 (t34783)
CO (t28448)

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img].
<font color="#666666">5 folds</font>, CO calls t400, <font color="#666666">1 fold</font>, Villain completes, Hero checks.

Flop: (t1200) 3[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Villain bets t800</font>, <font color="#CC3333">Hero raises to t2400</font>, CO folds, Villain calls t1600.

Turn: (t6000) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, <font color="#CC3333">Hero bets t4000</font>, Villain calls t4000.

River: (t14000) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, Hero checks.

Final Pot: t14000