Klasnic opened the scoring in the 32nd minute, volleying home from close range after a trademark Davies flick-on.
Dynamic duo: Ivan Klasnic (left) and Kevin Davies (right) celebrate the opener
Davies then got on the scoresheet himself just before the hour mark, tapping home after Martin Petrov had rounded Houston 'keeper Tyler Deric.
The only scare for Bolton on their way to a comfortable win came in the 78th minute when the hosts saw a Jason Garey goal disallowed for offside.
Petrov then went close to stretching the deficit as his effort struck the post with 10 minutes remaining.
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