Here's a picture with a french description.
http://www.lerepairedesmotards.com/forum/read.php?2,605882and a google translation:
A little advice for the repair of ignition boxes of 400 bandit type: 32900-10d00 (it also applies to other models
32900-46D00
32900-10D00
32900-10d10
32900-10D20
32900-10D30
32900-10D40
32900-10D60 - BB7701
32900-10D60 - BB7217
but not tested by me).
In fact you just open the case (quite boring because there is resin on the inside), and then just change the four large capacitor (this is the most common failure according to my research) see photo the:
Values are:
the two small 10μF 50V> 100V 10μF (I gave 50 because 100 were unavailable)
two big 47μF 35V> 63V 47μ
It is not very complicated but it is not to everyone either.
After this manipulation the bandit starts as it ever started.
Cost of operation 65 cents (4 capacitors purchased from nine
www.lextronic.fr). When there are boxes that offer 150 euros to repair it quiet.