The CDI is a small box with a large multipin connector and is located under the tank on the left side of the bike. The outputs go to the coils under the tank front on each side. I got mine replaced by my dealer last Spring. If primarily one side is cutting out, try swapping the coils (L-R). If the cutting out moves to the left - it's the coil, if it stays on the right - it's the CDI.
