This is a pic of the 1500D clutch spring removed from my bike after 11,000 miles. The inner teeth were almost worn through. Should they wear through, you will have a complete clutch failure. If your clutch is slipping, even slightly, I strongly suggest you order a replacement spring and replace it ASAP. Part no. 92144-1295 -- Wiliedog VROC #005 black/red 1500D1 Coushatta, LA