Cylinder Head 70Cc Nk102.83Cylinder Head 70cc for Minarelli horizontal AC, CPI, Keeway E2Aluminium cylinder head with large combustion chamber suitable for Minarelli AC 70cc cylinder kit NK100. 31 (order number) and CPI, Keeway cylinder kit NK101. 47 (order number) Also suitable for any other 70cc cylinder with 47mm bore When using a Chinese engine: This Naraku cylinder head requires the use of a short thread spark plug (NGK type H means short thread) such as BR8HSA, BR8HS