Sold by most UK motorcycleshops, the Digital Gear Indicator (DiGI) from
Datatool. It is a redcolored led that promises to display the gear your in when riding. Because the Yamaha Diversion XJ900S doesn't have an electronic speedometer, your have to buy an extra adapter. This will provide the electronics of the necessary electronic pulses. The adapter must be installed in the holes of the rear breakplate. Due to the number of hours it takes to install the DiGI, it may be wise to install it yourself instead of by the dealer.
We are not shure if it all works well. Renzo Franicevich from Belgium has successfully installed it himself and is also responsable for the following two PDF files. One is the english manual, the other a description of himself of the installation.