All that's left is to fit the motor, idler gear and cover to the Kenne Bell throttle body. You'll need to set the clearance, or lash, between the motor's gear and the idler gear. Kenne Bell provides a 0.015-inch wire gauge for this--fit it between the gears as you tighten the motor's two retaining screws. Because the idler gear covers the one motor retention screw, you'll need to just snug the motor's screws, temporarily fit the idler gear and check the lash, then remove the idler gear and tighten the motor's screws. It'll take maybe three minutes and a couple of tries to get the lash correct, but it's not difficult.