Villain is a reg, guy behind him is a donk. I feel like he's weak when chking back flop, should I be exploiting this? My range has much more strong combos. I can rep any straight, any two pair, set fh..

Hand History for Game 125017044828 (Poker Stars)
$50.00 USD NL Texas Hold'em - Thursday, November 13, 06:58:58 ET 2014
Table Becrux III (Real Money)
Seat 1 is the button
Seat 1: J3vgen ( $50.00 USD )
Seat 2: ozzi25 ( $57.65 USD )
Seat 3: k4ir0s ( $50.00 USD )
Seat 4: acid dark ( $73.55 USD )
Seat 6: djammusic ( $51.00 USD )
Seat 7: joker180785 ( $52.25 USD )
Seat 9: quester888 ( $79.82 USD )
ozzi25 posts small blind [$0.25 USD].
k4ir0s posts big blind [$0.50 USD].
* Dealing down cards *
Dealt to k4ir0s [ Jh Kc ]
acid dark folds
djammusic folds
joker180785 raises [$1.50 USD]
quester888 calls [$1.50 USD]
J3vgen folds
ozzi25 folds
k4ir0s calls [$1.00 USD]
* Dealing Flop * [ 8h, 7s, Ac ]
k4ir0s checks
joker180785 checks
quester888 checks
* Dealing Turn * [ 6h ]
k4ir0s checks
joker180785 bets [$3.04 USD]
quester888 folds
k4ir0s raises [$8.35 USD]
joker180785 calls [$5.31 USD]
* Dealing River * [ 6s ]
k4ir0s bets [$16.39 USD]