To help you determine what year your Solex is, I will need the seven digit motor serial number that is stamped into the top, rear of the motor, as far back on the motor as you can go, right near the steering tube. You may have to clean the area and use a flashlight to see it. If there is a seven digit frame serial number stamped into the right side of the frame near the weld joining the main downtube to the steering tube, I would like that also. And of course a photo of the bike would help if possible. I have emailed this info to you also.