Reinstall the primary chaincase cover. Tighten the primary cover bolts to 110 inch-pounds. Remove the derby cover using a Torx driver, then fill the primary chaincase with 1 quart of Harley-Davidson Sport-Trans fluid. Reinstall the derby cover and tighten the cover bolts to 50 inch-pounds, alternating between bolts in a crisscross pattern. Reinstall the rear cylinder exhaust pipe and tighten the exhaust pipe nuts to 96 inch-pounds. This step applies only to Sportster models.