Raptor 30/50 v1 assembly manual
Page 21 [click here for index]

Slide the belt through the tail boom. You may need to tie a string on the belt then use it to pull the belt through the boom. Install the tail case from the previous page on the end of the boom with the holes (not the slots). Make sure the protrusion on the inside of the tail case fully seats in the hole of the tail boom. Wrap the belt around the tail gear and slide on the bearing (5) on the end of the tail shaft against the red gear. Install the pulley (16), this is a loose fit until the other case half is installed. The belt will ride under the pulley, don't try to wrap it around. Place the left tail case (6) on. Make sure the protrusion on the inside of both case halfs are in the holes of the tail boom. If you don't get this right then you won't be able to get the tail boom to slide in the frames far enough to wrap the belt around the front tail gear. Install the bolts (1) and nyloc nuts (4) to secure the tail case and the tail fin (7). Rotate the red pulley on the top of the tail case to make sure it is free. If you tighten the bolt too tight then you will get resistance when trying to rotate this part.

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