I am looking for a good CDI for my 650. I swapped a 91 RXL engine out for a 89 650- which I biult. While finishing the instrall today, I realized that I never checked the CDI. I am looking for a CDI out of a 79-80 Polaris Centurion, 81-82 Polaris Indy Centurion, 83-87 Polaris Indy 600, or a 88-90 Indy 650. Thanks Much for your help.