PokerStars No-Limit Hold'em, 52.5 Tournament, 10/20 Blinds (2 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (BB) (t2200)
SB (t800)

Hero's M: 73.33

Preflop: Hero is BB with 4, K
SB calls t10, Hero checks

Flop: (t40) K, 2, K (2 players)
Hero bets t20, SB raises to t40, Hero calls t20

Turn: (t120) 6 (2 players)
Hero checks, SB bets t60, Hero calls t60

Villain is super passive, calling station. Never raises. When he has a very strong hand, his betsizing is very small (like 80 into 350 pot). It's an easy hand but I have some doubt whether to raise flop, call and lead turn or ch/c all the way until SD. Vs a little bit less passive guy I'd definetely raise flop big > get it in and charge his 2. But what is a better play vs this villain?

If he is so passive,looks good,see a river.