Hey guys. So today I picked up a 73 cb750 from my neighbor which has been sitting outside for a few years with only 6k original miles. The motor was seized up so I sprayed wd40 down the plug holes and let it soak. After letting it soak I popped off the point cover and began to spin the 23mm nut to spin the crank and un-seize the motor. It broke the motor free. So I then tried to kick start and the first pump didn't start it so I tried again. On the second attempt the kick start was too hard to push down like it was seized again. So I tried to spin the nut again on the crank and it snapped off. I was wondering if anyone knew how important that nut was and if I am totally screwed? I hope someone can help me out!