The Engine is a four bolt 25cc, I do have all the parts except the mag and carb. Not sure where those went off to. Let me know if you want it, I can drop it in the mail on monday. We (the club) have queit a few of these engines flying. A Curtis Robin, a BalsaUSA 80" Eindecker, a scratchbuilt stick, scratchbiult Eurocoupe, and a couple of others. Great engines. Really easy conversion.