by dennis » Mon Dec 24, 2012 4:39 pm
That is a K&B65 Sportster. The 91 as I was informed was put on the backplates of the engines made for the military drone program. I have had a few of them and they have a carb that is not up to snull and does not idle as well as a regular production 65, Probably only needed to shut the engine off if hit.