This ceramic cylinder kit fits the reproduction 1999 - 2005 Whizzer WC1 engines, which is including 57mm ceramic cylinder assembly with base paper gasket, new head with copper gasket and hardware, carb spacer kit, piston set, exhaust manifold set and compression release cover plate.The advantages of this ceramic cylinder kit are as following for your 1999 - 2005 whizzer WC1 motorbikes.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.This is an upgraded kit, which we offer 100% warranty. If any problem, we will have our dealers in USA to help you.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.