[nolatron]

I had the same issue with my XL motor. I used two large flat head screw drivers. Place 'em behind the the gear on either side of the shaft and then rotate the screwdrivers together so the flat heads are hitting the inside of the gear (near the shaft).

The flat head will push the gear outwards off the motor shaft, and you don't have to worry about prying on your motor shaft and risk bending anything. Mine slide right off.