No reads on villain

No Limit Hold'em $0.02/$0.04
Merge Network
6 players
Formatted by pokercopilot.com - Mac OS X hand history analysis and tracking

Stacks:
UTG - UTG ($2.80)
MP - MP ($4.00)
CO - Hero ($5.01)
BTN - BTN ($6.99)
SB - SB ($4.50)
BB - BB ($5.78)

Preflop: ($0.06, 6 players) Hero is CO with K K
1 fold, Hero raises to $0.14, BTN calls $0.14, 2 folds

Flop: 5 4 3 ($0.34, 3 players)
Hero bets $0.28, BTN raises to $1.18, Hero calls $0.90

Turn: 6 ($2.70, 3 players)
Hero checks, BTN bets $5.67 (all-in), 1 fold

Total Pot: $8.37

BTN wins $8.24

The only thing I can think of adjusting, is betting on the turn card, and if I got reraised, I'd fold.

but seeing that he raised me on the turn, I assumed he had something, so it was a check-fold.

righjt?

Once you are at the turn, check-fold is correct, betting is not going to help you. I would probably just sigh and fold flop to the raise though.

This is a tough one if you have no read. If villain is a really loose player, then he might have flopped a straight or random two pair and you'd be drawing almost dead. Against a more competent player, his range for raising the flop isn't just sets. There are also lots of overpairs that you are beating. I think you have to make the decision on the flop. Either give credit to villain for having a set and fold, or 3-bet shove and hope he has 66-QQ. In terms of pocket pair combos, you're actually way ahead, even if you include the highly unlikely AA.

Board: 4h5s3c
Equity Win Tie
CO 63.57% 60.86% 2.71% { KdKc }
BUT 36.43% 33.72% 2.71% { 22+ }

Even if you put 76s and 76o in villain's range, you still have more than 50% equity.

Board: 4h5s3c
Equity Win Tie
CO 51.58% 49.32% 2.26% { KdKc }
BUT 48.42% 46.16% 2.26% { 22+, 76s, 76o }