It's really not all that cost effective to have the bearings in a 1hp motor replaced. Most of the time you get a 90-day warranty ON THE BEARINGS only. A motor with loud bearings generally has been running hotter than designed and the windings begin to overheat. This causes deterioration of the laquer insulation and eventual failure. Most new motors come with a 1 or 2 year warranty. It's the same amount of work to remove and replace with a new one and you don't have to make a second trip to a motor or pool shop to pick up the motor when the bearing job is done.

For the Whisperflo remember to get a new shaft seal and all the O rings when you do a replacement or repair of the motor.