Rev limiters come in many forms...lol. Pipes, carbs, pistons, porting, rods, all the above. But, a banshee does not have an electronic rev limiter. The screw is there so you can make sure your not putting to much tension on the throttle cable at full throttle. If your slides in the carbs are all the way at the top and your pushing the throttle really hard... it could snap the cable. If you adjust theat screw properly, you'll be putting force on the screw instead of un-do stress on the cable.