Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
You can use a Sparkrite TT electronic ignition on the CB175, it retains the points, but using a much lower voltage across them, resulting in much longer life for the points and less frequent adjustment. Found just what you need on e-bay, item number 151154496435 he's got 2 of them, apparently new and unused, probably worth a punt if you want to go down that route