Sorry, it's dang long,
Lets put the brakes on and do some critical thinking here,,,,
These are all statements by the op.
Bike was ran with no oil / fuel mix. How long? A few miles turned into a half a day!
Statement by op,," I had to run the motor without oil for a few miles, then engine froze,,
im sorry if its so confusing, i think since i ran my motor with any oil for half a day it might have ruiend my motor"
Until the engine seized. Statement,," so i took the top off and had to push the piston down, this made it disenage when the spark plug was out and had no compression"
Possible damage? Seized piston resulted in,, broken piston, or scored cylinder, or broken rings. Symptoms? Piston moves up and down with head on and plug in. But won't start.
Piston moving was verified by? Removed head and spark plug, visual inspection. Op claims to hear piston moving while head and plug are installed. But won't start.
Compounding the issue the op determined the clutch was out of adjustment, so,,
Op tightened the clutch down until it no longer functioned, (engage or disengage).
Piston still moves. Statement by op, "i think it might be a clutch issue? i can't start it because, theres no resistence its too losse but i tightend the clutch as far clockwise as possible" and also,," bUt..I tightend the clutch screw 0on the right side and still the motor NOW does not engage. its like the exact opposit has occured." Along with,," my clutch seems all messed up, and no tightening it will help (on right side of clutch/gears)". Now he is at, "but my clutch arm is hitting the bottom of the carb so i dont even know if it will work this tight anyways. ahhh...if i do tighten the nut evn more on the right side, and make it engage, is there a way to adjust the clutch ARM to make it disengage therafter?" Still won't start.
"Engage, disengage", seems to be part of the problem! "so i took the top off and had to push the piston down, this made it disenage when the spark plug was out and had no compression."
Meaning? Now the bike would roll freely?
And looking at," bUt..I tightend the clutch screw 0on the right side and still the motor NOW does not engage."
Meaning? Now the engine turns freely, but no compression?
Considering that we already know parts ARE NOT necessarily interchangeable from different manufacturers / sellers, without knowing where the op got his 2 motors the idea of taking 2 to make 1 is really not an option,,,yet. Too much is unknown. I feel the only way to get the op back on his motored bike is a good inspection and possible top end rebuild, (maybe more?). How much is all this going to cost? Is it worth it? OR maybe its time to go a different route. It just might be a better avenue to take if the op changes from 2 stroke to a 4 stroke setup. I say this in light of the op's lack of understanding of motors, and his dependence on his bike for transportation. Since this is his second motor I would have to investigate his riding style,,, does he peddle to take off or does he ride the clutch? This is mentioned only because he has stated that he had problems with the clutch on his first motor. The Happy Time motor is not meant for everyone! But with so many motor and mounting options available to us there is no reason why a motored bike can't be built for his use.
Papa