Revolution does not have kicker motors at all. It originally had drive wheels set to govern the speed entering the loop's entry ramp, but that's it. The wheels you are referring to are not motorized. They release the anti rollback mechanism if the trains stall and try to roll back.
Several of Schwarzkopf's coasters have this feature. Sooperdooperlooper, Shock Wave, Revolution, and Whizzer all use this system. SFOG Mindbender used to as well. Ever wonder why the anti rollbacks are silent except on the lifts? That's why. These coasters originally had silent lifts as well but they have all since had this mechanism removed giving us the traditional clicks. A very keen eye will still be able to spot where these little tires used to be attached to the lift hills on all of these rides except Whizzer. The only way those wheels ever spin is when the trains roll over them. They will continue spinning after the train has passed on their own momentum.
1977 footage from the movie "Roller Coaster" shows the wheels when they were still on the lift hill.