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I have three '81 CB750C's. This will be an extra bank of 4 carbs that will be put together with spare parts that I have. This clogged carb body came to me on a non-runner that I never tried to start until I refurbed the carbs. Easy to find this broken pilot screw while cleaning that bank of...
I just bought ten 1oz. bottles of JSP 67% nitric acid for $16.31 plus sales tax, free shipping, walmart.com. Expect delivery April 5, next Friday. Pictures to come. Pretty cool if it works, huh?
Options......................build a special punch, devise a way to pry
drill an access hole, build a special punch,
fix the access hole
play with burning acid and toxic fumes
Gotta say........burning...
Just want to add here that I personally have never turned a pilot screw clockwise into this carb body ever. I just removed the pilot screw to do the cleaning and noticed that the pilot screw was not "all there".
I've tried sewing machine needles, they're humungous compared to this hole. I cut them shorter than the ID of the throat and reduced the tip size of the needles with a diamond hone, even blunted the tip. Lined these up horizontally in the throat with the hole and tried to pry them towards the...
A drill and extractor will not work. This is the very tip of the pilot screw and it is tapered. If I could push it out it would only go one way. Couldn't even chuck a drill bit that small in any of my drill chucks, even if I could get a drill bit that small.
How small drill could a drill chuck...
Removing a broken off pilot screw with Nitric Acid, that's the title of the video on Youtube, by Jason's Daily Safari, 1:10 short. This guy just drops a few drops of acid down the hole and the brass is gone, says it won't hurt the carb.
I'm not a linkster at the moment. I did find 10-1 oz. bottles at walmart.com for less than $10 shipped. This is for an extra bank of carbs that I can temporarily use between three bikes. I have all of the good used and new parts to put this extra bank of carbs together except for this one carb...