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  1. G

    Hole in crankcase help

    No insult taken. I'm pretty handy mechanically but this is new territory for me. Im really doing this to learn more than anything, figure I need to start somewhere. I really appreciate the info. I think I'm going to tear into the engine anyway, just to get my head around whats going on, while I...
  2. G

    Hole in crankcase help

    Ok, so removed the engine and took off the oil pan. There is definitely some shrapnel in there. But not a ton. Scrap either way? Any hope in rebuilding it, or should I just look for a new motor? I was hoping to split the case and replace just the bottom portion of the crankcase. Is the issue...
  3. G

    Hole in crankcase help

    So I have been restoring a 1980 CB750f and finally was making headway. I got it running and got the carbs relatively balanced. The other day I went to start her up and heard a loud bang and the engine appeared to seize. It would not turn over for a few tries. Then all of a sudden it worked fine...
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