News
Positron confusion and brake lever photo
I have a 1977 CCM Targa 10. I am trying to determine which positron deraillieur has and if I can purchase new cables for the shifter (dual cable, continuous piece and housing. Any help would be appreciated. Also looking for an photo of the internal workings of the brake levers with the cable in place so I can replace brake cables.
The 1977 Targa 10 used 1st generation Positron. The rear derailleur was simply called Positron but the model number was DG-100. Since the deralleur did not have a return spring, the shifter used an extra long cable that wrapped around the shift lever barrel, resulting in two cable runs that performed in a pull-pull mode. Slippage of the cable on the shift lever barrel was prevented by a set-screw. Cable construction was traditional stranded wire and the length was about the same as that for a tandem bicycle, so that is the easiest solution for cable replacement. Alternately, you can splice two cables together by slipping the ends into a piece of appropriately sized tubing and crimping the tubing to secure the wires.
The pear shaped barrel end of the brake cable fits into the recessed hole of a small rotating cylinder that is located at the front upper end of the lever 's blade.