there's 4 screws on the bottom of the truck. flip it over, you'll see a somewhat large, FLAT purple piece (looking at it, right-side up, straight down, it's what you're motor is mounted to). that's... well, your motor plate. heh. but yeah, there's 4 screws, loosen then just enough to where you can move the motor around. get a small piece of notebook paper, insert it between the clutch bell and the spur gear, move the motor into the spur gear so it's tight (do this while the front of the truck is pointed straight upward, it'll give you access to the underside). tighten the screws so they're pretty snug, but not tight tight. remove the paper, check the mesh (should have a TINY bit of play in it.... and i mean tiny). if it's good, tighten those screws as tight as you can possibly get them. the tighter the better. if you want use threadlock. most everyone here will probably recommend it, i personally do not use it cause i remove the motor a lot.
