This article lays out the steps to transfer/replace the freewheel and brake rotor from the Revv 1 once you have the rear wheel removed. If you haven't removed the rear wheel yet please visit "Revv 1 Rear Wheel Removal" 

Step 1: Remove brake rotor

You will want to remove the brake rotor first, before the freewheel, to prevent damage to the brake rotor. There are 6 T25 (Torx) bolts that hold the rotor on.

Slide the rotor up and off, minding the motor cable to be sure it doesn't get damaged. Take care to not touch the braking surface of the rotor (outer loop).

Note the orientation of the rotor as you remove it from the wheel. The eyelets that are circled in red are flush on the outward-facing side of the rotor and slightly stick out on the side that faces the wheel. If your rotor has writing on it, make sure that side faces outward.

Step 2: Remove washer from the old wheel

Remove this washer from the old wheel and set it aside, you will need it later.

This washer lives further back inside the freewheel and is easy to miss.

Step 2- Remove the freewheel 

You will need a "Shimano style" freewheel removal tool to remove the freewheel. Our favorite is the Park Tool FR1.3, but this type of tool is available from other manufacturers.

You can use an adjustable wrench or a 1" socket to turn it counterclockwise. Bracing the wheel on the ground between your feet will give you the best mechanical advantage.

Step 3- Remove spacers

Remove the two spacers that reside beneath the freewheel and set them aside. Note the position they came off, as the thicker of the two rests closest to the freewheel.

Revv 1 FS models with "boost"

Step 4- Reinstall freewheel

The steps to reinstall the freewheel are similar to taking it off, however, we want to remember to grease our new part (or clean & regrease if performing maintenance/transferring to a new rear wheel). Any automotive grease will work fine for this procedure.

Install spacers

Grease the threads of the freewheel

If using a torque wrench, tighten to 40nm. If you don't have a torque wrench available, tighten until it the wrench doesn't turn anymore (use moderate-firm pressure). Replace the washer from step 2.

Step 5- Reinstall brake rotor

You will want to tighten the bolts in a cross pattern so that every bolt gets equal torque.

Start with #1 and go in the above order. Insert all bolts until they're barely hand tight.

If a torque wrench is available, use the same cross pattern and torque to 6nm. You will want to do 2-3 repetitions with the torque wrench, as fasteners like to wiggle loose very slightly when their neighboring bolts get tightened. If a torque wrench is not available, tighten just past hand tight.

Once these steps are complete you are ready to reinstall your wheel.