Ok, so on my 88’ I have a sport Bob tank on it that wasn’t intended to have a speedometer cable that bends 90 degrees into the gauge. Harley did make an adaptor for this, but I don’t have a part number or a name for the part that helps with this issue so that the cable doesn’t kink and or break. This is what happened to the new Barnett cable I bought. If anyone knows the parts name that I seek to help smooth out the hard turn it takes to install the cable would be great! Thanks in advance! Oh and I did get her out last Sunday on her new shoes and rear all ball racing bearings! Very therapeutic!
The FXR arrrangement used a special speedometer with an angled cable entry. Hard to find and costs about $400. The speedo part number is 67168-88 or 67168-88A. Here's a link to a german website (google translated) that has some pictures of that unit.
I did see in my web search that there might be some snowmobile speedo cable angle adapters and I saw that Autometer has an adapter. But I didn't readily see specs on those parts.
You would have to check on connection threading & cable size/style to see if you could use those as is or would need to make your own modifications.