Both motor plates inner or outer bb support needs to be pulled out for pinion change.

The only difference is the plate remains on the motor while the pinion is swapped out. The cam locking shroud covers the access to the pinion set screw.

With a stock mount, you still have to loosen the two socket cap screws.

With ours, a single M4 locking nut is loosen, and the beauty of it, it does not need thread locker each time you do a pinion change.