This past Friday I pulled two of the bearings out of my PT. All four had been notchy and I wanted to see if I could remove / replace them without destroying anything. Pulled one out of the freehub body with no trouble. It spun free as did the one remaining in the body. Hmmm. Went ahead and replaced the one I took out since I applied a lot of force to the inner race. Took one out of the hub on the battery cover side. It spun nicely as did the remaining one.

The issue with drag / notchness appears to be related to how they are initially installed. The spacer in the main hub that has the magnet taped to it is slightly compressed by the inner races of the two bearings. This force on the main bearings from the spacer deflects the races enough to cause significant drag. The spacer must be held in place relative to the two races so that it stays stationary in relation to the hub body. My guess is the magnet is used to turn on the hub and does that when it freewheels for the first time.

So the solution was to gently press the new bearing back in while keeping the spacer aligned and checking to make sure there was enough force to hold the spacer in place but not enough to significantly deflect the races.

So reassembled with two new bearings and everything appears fine. Did a test ride on Friday but haven't had it out in anger yet. Just remember the magnet goes on the freehub side and not the electronic side and it has to be kept stationary in relation to the inner races.