I don't work on Hondas much, so I figured I'd verify this. Spring pulls tensioner to proper tension, Then you just torque the bolt?

 

basically, yes.

however it would be best to check a good service manual, there is a procedure for getting the correct tension out of the spring pulley (does that make sense?)

in general terms, you'll have to losen the tensioner pulley, spin the crank a specific distance, then retighten. for details really check a manual.