According to the manual that reddogge attached, weight adjustment is done by turning the limb bolts in a clockwise direction. This would be similar to tightening the limb bolts on a regular takedown bow. However, before this will work, you have to remove the locking screws from the other side of the riser. This is easiest to see in the picture of the longbow on the first page. The limb bolts are fairly obvious on the back of the limbs, whereas the locking screw is probably accessed through the hole that is visible on the belly of the riser. You have to try different Allen wrenches through this hole until you find one that fits, and then remove this locking screw. Then you tighten down the limb bolts until you get the weight and tiller you want, and then reinsert the locking screws and snug them up against the limb bolts. This is probably a lot easier to do than it is for me to describe.