The Naraku Nk600.03 cylinder and piston kit is a displacement-increasing kit for air-cooled four-stroke 125–150 cc engines. It has a cylinder bore of 58.5 mm and can be used with the original cylinder head.
- Engine type: Air-cooled, four-stroke
- Engine displacement: 125–150 cc
- Cylinder bore: 58.5 mm
- Compatibility: Kymco Heroism 95–00, Sym Tonik 11–16, Kymco People S 06–16, Rex RS1000 125 08–18, Super 8 08–16
- Cylinder head: Compatible with the original