Boring 17" B Cases For 124

[WhipLash96]

I know that boring these cases for a 4.125" or more bore will leave it pretty thin for the center bolt. I was told that there is a "special center bolt" that is offered that somehow makes this concern go away. What is so special about it?

Also, since this is a 17" case and not having the Timken, will having the Timken conversion done to this case be as strong as if it came stock for the Timken?

[SP33DY]

S&S and Zippers include a special center bolt in their 124 packages. S&S uses a bolt that is turned down in the middle, and is not removable once the cylinders are installed. Zippers uses a thinner bolt that is supported on either end by bushings in the case. It can be removed after the cylinders are installed. I haven't had any problems with either one.
If you are sourcing cylinders from another vendor other than S&S or Zippers you will have to turn down a bolt or use a thinner bolt and make bushings.

[Don D]

Harley has a screw, PT#1090a, that works when the center is cut down for jug clearance. It incorporates an oring under the head and allows the case not to be drilled on the opposite side.

[WhipLash96]

S&S and Zippers include a special center bolt in their 124 packages. S&S uses a bolt that is turned down in the middle, and is not removable once the cylinders are installed. Zippers uses a thinner bolt that is supported on either end by bushings in the case. It can be removed after the cylinders are installed. I haven't had any problems with either one.
If you are sourcing cylinders from another vendor other than S&S or Zippers you will have to turn down a bolt or use a thinner bolt and make bushings.

This bolt can't be purchased seperately?

[JSD]

Baxter in GA has em. And on his U tube shows how it works.

[SP33DY]

S&S and Zippers include a special center bolt in their 124 packages. S&S uses a bolt that is turned down in the middle, and is not removable once the cylinders are installed. Zippers uses a thinner bolt that is supported on either end by bushings in the case. It can be removed after the cylinders are installed. I haven't had any problems with either one.
If you are sourcing cylinders from another vendor other than S&S or Zippers you will have to turn down a bolt or use a thinner bolt and make bushings.

This bolt can't be purchased seperately?

I never tried to buy one. I suppose they sell them. It only takes a few minutes to make one, so I made my own when I had to.