This ceramic cylinder fits the reproduction 2005 Whizzer NE5 engine with the new head, which is including cylinder, valves, seals, springs, plates and C-clips assembled with base paper gasket and head copper gasket.The advantages of this ceramic cylinder are as following.1. increase the engine perfprmance.2. hardened honing surface against the wear in the long last working with the piston rings.3. quickly engine working temperature releasing.4. Lighter than the Iron sleeve cylinder.If you want this ceramic cylinder to be installed onto your 1999 - 2005 WC1 engines, which you will need a NE5 new head and head bolts. Please contact with us for the additional cost.We are offering complete parts and kits for a home-built Cruzzer Motorbikes. The assembling processes are shown by videos on the website"cruzzermotorbikes.com". For more detailed information, please check our blog "wc1manufacturer.wordpress.com" by Google search.NOTICE: We, the seller of listed item or items, are NOT Whizzer USA. We DO NOT represent Whizzer USA. We are NOT affiliated with Whizzer USA or the Trademark Whizzer, Whizzer USA, Whizzer motorbike. We manufacture and sell aftermarket parts that will fit on certain Whizzer motorbikes and non-Whizzer scooters. We do not manufacture, offer or sell Whizzer brand parts. Any use of the term Whizzer or Whizzer models in the listing are solely for item description purpose only.Dealers wanted!We offer the TO-DOOR sea freight shipping service.