Piaggio NRG 50 Power LC 18- Torque Spring +1000 Naraku Sport. Naraku Exhaust Stud & Nut Set (M6 x 32mm). Piaggio NRG 50 Power LC 18- Water Pump Repair Kit. This product is suitable for the Piaggio NRG 50 Power LC (DD Disc / Disc) 18- E4 [ZAPCA7100].