Although I had planned to put a Saito FG90 R3 in this airplane, I changed my mind due to quite a few less encouraging posts about this engine. First, the gas/oil mixture is different compared to a regular two stroke, and then there are too many cases where rods failed and caused lengthy interruptions. Lastly, the price. 1500 bucks is no pocket change, by any means. So I opted for an EME 70 twin from MilehighRC in Colorado. Their service was flawless and their prices are second to none. Motor already mounted. Perfect fit under the hood.