Hi jayhawk The regulator you install will differ from the old one. The mounting surface on the new one is larger and requires longer screws, which are included. The reason is to dissipate heat more efficiently from the regulator, thereby increasing it's life. Make sure to coat the contact area of the new regulator with the white grease which should also be included as this also helps to draw heat away. Also, make sure the filter isn't dirty. The incoming fresh air is what cools the motor and regulator and any restriction can shorten the life of both parts. Good luck