the 110 could be many things sized just means she wont turn over could be in the bore its self
or a timing chain broken and siezed valve stuck open or bent!! bottem end dramas and 20 other things
u need to know a lil more about a 4 stroke engine if even thinking about repairing it and it may even be cheaper to grab a 125 or 110 3 valve oil cooled engine they should fit any frame configuration that ran a 110 even a honda

the 49 cc it is probbly a carby problem for sure if its a standard carb the taps can sometimes be restricting flow kinked lines vent hole in cap , fuel filter etc... etc..
as you have read in other posts but blowing the main jet out with compressed air and Another clean out wont hurt it
even try to borrow a carby from a friend who has already upgraded their carb and kept the standard for a spare

last is the coil but if it ran before then its still getting some spark, try disconnect the killswitch it could be shorting out
its trial and error but sounds verry much like the dreaded fuel problem almost all bikes have once or many times

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