2 stroke engine:

E101:40mm, air cooled.40CC

E102:44mm,air cooled,49CC

E103:37mm, air cooled,39CC

E104:air cooled,43/49CC, for mini bike and gas scooter

E201:37mm, water cooled,39CC,Blata Origami 

E202:36mm, water cooled,39CC,Polini GP3

E203:40mm,water cooled,49CC,ZPF

E204:36mm,water cooled,39CC,Polini 911