ORIGINAL: av8tor1977
Man, how embarrassing!! [

] FALSE ALARM. I just took it apart and measured it and it is a plain old 25cc engine. I thought the cylinder looked different than the 25cc engines I have, but after getting it apart I see that it is not, and it measures out at 25.4cc.
Oh well, I'm bummed....
Hey wait, I wonder if I can make my other 30cc Echo pieces fit into this crankcase? I'll have to look into that.
AV8TOR
What is the stroke on the engine you just took apart? If it is the same bore as the one,s you have, to be a 30cc engine the stroke would need to be longer. There is a web-page with all that data. I will take a look also. Capt,n