I have a Seagull Models .61 Yak 54, and need engine suggestions. I know I am going with 2-stroke but four stroke might do it for me, and .61-.85 size, but what brand? I want to be able to go vertical on 3/4 throttle while the engine still fits inside cowl without too much cutting, except for the muffler.

I had read about a saito 100 on one, so I put a saito 100 option. but if you have another reccomendation for an engine size than put a new message.