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Discussion Starter #1
I am in the process of cleaning and rebuilding my CV34 carbs of my 85 ZN700.
I have already rebuilt my carbs for my 77 KZ650. So my knowledge of rebuilding carbs is okay. I am no expert.
In the process of trying to remove the four adjustable pilot screws, one of the screw heads just tore off. It would not budge. So now I have nothing to grab onto to get it out. Do I get a really small drill bit, and ever so gently try to drill it out? I have had my share of drilling things out in my life, and re-tapping. But this one scares me. Any thought or suggestions?

Thanks,
Bill
 

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Take small punch or something similar and rap the end of the screw with the punch and hammer. This may help loosen the threads. This is part of the reason impact drivers work so well. Before you drill try to flatten the end and make an indention in the middle of the screw head.
Good Luck!
 

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Discussion Starter #7
Well, the good news is I got the part out. I didn't even touch the threads in the carb. So I am very happy.
Thanks for the suggestions on the reversable drill bit. Worked like a charm.
 
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