No much info I can find on this engine, I just found is was made by Super Tigre long time ago. Usualy they were 2 ports design and they were very unoficient engines, but in the mean time they were work horses and one of the best on its time. So to suggest you something, I defenetly will need pics-I had only one engine Super Tigre G15 and it was in 1977, I berely remember that engine, I do remmeber I used for while on control line speed with side exhaust mounted tuned pipe, I don't remmebr where I get it from and what happened with that.