winter rebuild 95 blaster

Now my problem is the stud on the bottom ball joint that comes up thru the bottom a arm, when i pulled the nut off to seperate it from the spindle, it wouldnt move so i did the worst i could do by beating the top of that stud with a hammer, now the threads are done, and cant even start a nut on it...
 
Ok sorry for the delay. i had to fly out to reno nevada for a short shut down job, i should have the project up and going again this weekend..
 
I put it all back together today, i still have to finish painting the plastics later, but i put a new set of rings and base and head gasket, i had an air leak prob before the tear down, i put it together to start breaking it in, but i noticed that it still has the knocking sound and just by barely cracking the throttle it still hangs the rev for a few secs.. im stumped.. i also put silicone on the reed cage where it would have leaked... any suggestions?
 
well, here is the unfinished blaster, i have been to worried if it would run right so i slapped it back together, all i need is to paint the axle carrier and the foot pegs, but it is not running right at all now...
 
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