I want to add a kit to one of my MTBs.Ive measured between the forks,the distance on one is 1000mm and the other is 1200.Ive been in contact with a manufacturer who says he can add a motor to any size wheel but I would need to order a few kits.Is there a standard width?I dont see why people should be having to widen their forks as you have to with the Alien kit.