What makes a BME 115 a custom engine? special porting job done, testing and running it at the factory, special and exotic materials used....?
I was also wondering what is the real displacement on this engine? 110 CC, 115 CC? Is there anything special (or custom for that matter) in this engine´s design that results in more power compare to the 3W, ZDZ and DA besides the obvious displacement difference?
I seriously doubt 3W, DA or ZDZ wont have the capacity of producing a light engine like this, maybe they just don´t want to do it. Designing is always a compromise, you just have to give up some things to gain others.