This 138cc 4 stroke engine has the following upgrade items to increase the power performance.1. Ceramic cylinder, which will keep the power when the engine is running hot.2. The new head with 2 holes, which offers the users an option to install the dual ignition coils to increase the burning efficiency.3. There are negative (crankcase) compression outlets (one on LH case and one on the compression release cover plate), which offers the users an option to install the big breather to release compression quickly.4. Heavy duty new cylinder head.We are offering complete parts and kits for a home-built Cruzzer Motorbikes. The assembling processes are shown by videos on our 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.
