Ultimately I would like to install it in my 88 inch Extreme Flight Yak but, it is one of the first versions! I understand that Tomy has since changed the crank and top end and has now got a good running engine. I have ordered some parts from Tomy which I hope are on the way. I have a 120 inch Norseman project ready for an engine so I'll mount it on it and see what it does, then it's going into the Yak! We'll see what happens!