Hey Airborn,
I've been trying to identify the engine that I have on my ULTRA STIK 120,,,I got it from the local pawn shop for $50, It came from a Homelite chainsaw, and believe it was something like a Viper Super II or something like that...I do know that it is at least a 30 cc, but not more than a 32cc. All the "experts" at the field said it would'nt work, but I still amaze them with 80+ mph fly-bys!!! It has the old contact point ignition system, so it must be pretty old. We tacked the engine at full throttle yesterday, and with it swingin a 18x10 prop, it was reading 6700 rpm or so....the airplane probably weighs at least 14 pounds, and that little engine pulls it flawlessly through the air.....check your pawn shops and start over......