Sprinkle tenderloins with salt and pepper. Place in a bowl or shallow dish. Cover, and refrigerate for 30 minutes.
Meanwhile soak toothpicks in water and prepare a gas or charcoal grill for medium-high, indirect grilling (variation: soak some applewood chips to add just before cooking)
Wrap bacon slices around pork, securing with toothpicks. Place on grill and brown for a few minutes, covered. Baste with some maple syrup and continue to grill for about 20-25 minutes, turning and basting occasionally with the maple syrup.
The pork should be done in 20-25 minutes total, or until the internal temperature reaches about 150° and the bacon is uniformly crispy.