bd specs are notoriously inaccurate, inconsistent or downright wrong. What it says is "sealed ball bearing" and "semi cartridge bearing" huh? Look at the photo, and it looks to me like yer standard non-adjustable cartridge bearing design, found on all of their bikes. Basically, the only thing that needs to be done is to make sure the cups are tight. To do this you need to pull the cranks arms with a crank puller tool and then tighten the cups with a splined cup tool. If you don't have these tools, then you either buy them or take it to your lbs.
The problem could also be caused by loose chainring bolts or even loose crank arms. Crank arms need to be tightened to about 33 ft-lbs, which can't be done with a simple hex wrench, unless you have monster hands. I use a calibrated torque wrench to do this.
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