6.50 - KK early, standard fold on flop?

[Pants Optional]

all players unknown, but likely donks seeing action
PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP3 (t1500)
Hero (t1490)
Button (t1645)
SB (t1405)
BB (t1560)
UTG (t1500)
UTG+1 (t1400)
MP1 (t1500)
MP2 (t1500)

Preflop: Hero is CO with K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises to t60</font>, <font color="#666666">2 folds</font>, MP2 calls t60, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t280</font>, <font color="#666666">1 fold</font>, SB calls t270, BB calls t260, UTG calls t220, MP2 folds.

Flop: (t1180) J[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets t1125 (All-In)</font>, BB folds, UTG calls t1125, Hero...