Wow.. I have a 160 os single, a Saito 180 or a EVO 35 that I can use. Sounds like the EVO is better suited but, between the cylinder head and the muffler I would really have to butcher the cowl up. Wieght wise the evo is about right, being 1.7 oz heavier than the OS. The other thing that I am concerned about is the small fuel tank.. appears to be a 24oz. The 160 two stroke will suck that dry pretty fast. I will play around with the EVO tonight and see if I can spin the engine on the fire wall to disguise as much of the engine and muffer as possible. I also have a brand new Brison 3.4 that has a much shorter head but due muffer (pits style) it would meaning cutting the fire wall back for clearance. (about 1"+) I guess this is possible if I engineer a pocket.. I will have to check that out as well.