just for comparing,
DLE specs,
Weight: Engine: 22.93oz.(650g)
Exhaust: 1.76oz (50g)
Ignition: 4.23oz (120g)
Total: 28.9oz (820g)
accordingly to my OS 61FX 2St manual and the Saito site both the OS 61FX and Saito 100 weigh the same (550g),, while the newer Saito 125 weighs only 70g more, (70g = 2.46oz)
Saito's 20cc Gasser Total Weight with muffler and ignition is: 31.2 oz (884.51g)
but price is a different factor
http://saito-engines.info/specifications.html
Jim