RE: Ultralight with a DLE 222cc for engine ?
UL max weight is 254 lbs. empty.
IIRC, Homer Kolb, designer of the Kolb series of ULs, first flew his with 4 chainsaw engines, about 5HP each, in 1956! He is in the EAA Hall of Fame.
The first popular ULs were hang gliders with chainsaw engines added, early '70's.