This is a pair of coils that fit 1981 - 1983 Yamaha XJ750 , XJ 750 Maxim & Seca 750 also fits 1982 - 1983 XJ400, XJ400 XS400 XS400 Maxim; also fits 1982 XJ650 Seca. There are no ends on the plug wires and the electrical wires have all been cut. There is a little rust on the posts. These tested good on our professional coil tester.
The part numbers are: CM12-09 & CM12-10