by JerrryR » Sun Oct 25, 2020 11:50 pm
Hi Guy,
There are a lot of guys on this site that would know more than me about what date code would be appropriate for a 58CH. As far as the difference between a 57-58 XL-XLH frame and a 58CH frame, here they are.
The XL frame has two square metal bosses that mount the coil and support the toolbox/coil cover on the left rear downtube that would have to be ground off.
The XL frame will have a "Wedding Band" on the right rear downtube that will have to be ground off.
The XL frame will not have the sleeved hole in the backbone for the rear CH tank mount. This can be fabricated. I don't have it in front of me but if you needed it I could get you the tube ID & OD needed.
The only difference in the 58 CH frame up until somewhere in the later 64 model year when the boss on the right side bottom of the seat casting for the 65 model year voltage regulator or coil appeared is the small hole on the right side of the neck casting to clamp the speedo cable. That started in 59.
Good luck with your hunt for a frame,
JerryR