If you have all the new and correct parts, you should be able to do it. I say correct because the wheels may be dished. Bicycle rear wheels are dished. This simply means that the spokes on one side are a little shorter than the other in order to offset the hub. I'm not sure if MX rear wheels are the same but even if they are, no big deal. I have laced up many bicycle wheels and MX wheels are the same concept. You might also want to examine the rim and make sure the spoke holes in it are or are not angled in the direction of the spoke. If they are, just make sure you align the first spoke correctly. After the wheel is all laced up, turn all the spoke nipples in the same amount of turns, say three turns and only three even if they are still loose. This is simply to create a starting point. Now starting at a marked spot (mark a spot with paper tape) turn each spoke in an additional turn. Repeat the process until the spokes start getting tight. When they are relatively tight, then you look for trueness. Spin the wheel on the axle and true it up. When you first ride it, check the spokes frequently and after every ride until they keep their tightness.