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I have a 3/4 screw-on Schebler that has the course (3/4-14) threads. All the early HD's used the same carb but with the fine (3/4-20) threads. I would like to know if anyone has converted one, either by modifying the body or making a custom intake.
To modify the body, I was considering a couple of options. One would be to drill out the threads and put in a sleave, then re-tap with the LH 3/4-20. My concern here is that the walls are not overy thick to begin with, say 1/8". Another option would be to braze in the threads, then drill/re-tap. This worries me even more.
If I had a new intake made with the course threads on the carb side, one would have to start the intake into the cylinder and turn several times before starting the carb on because the cylinder side is still fine threads.
Option C would be to sell the carb and find the right one. This one is really nice, though, and doesn't have the tickler which is correct for 1909-11. Appreciate your input!
Shown is a pic of the course-threaded carb that I want to use on a '11 HD, the other is the fine threaded version off of my '10.
DSC03523.jpg
To modify the body, I was considering a couple of options. One would be to drill out the threads and put in a sleave, then re-tap with the LH 3/4-20. My concern here is that the walls are not overy thick to begin with, say 1/8". Another option would be to braze in the threads, then drill/re-tap. This worries me even more.
If I had a new intake made with the course threads on the carb side, one would have to start the intake into the cylinder and turn several times before starting the carb on because the cylinder side is still fine threads.
Option C would be to sell the carb and find the right one. This one is really nice, though, and doesn't have the tickler which is correct for 1909-11. Appreciate your input!
Shown is a pic of the course-threaded carb that I want to use on a '11 HD, the other is the fine threaded version off of my '10.
DSC03523.jpg
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