I'll link ya when I get home... but it's like Xenonexperts.com or something... Trip is running the kit in his 600RR and love them... if you do the motorcycle kit they have a discount on the 2nd ballast and bulb.
for me I did the car setup (same size ballast as the motorcycle kit) because I have two bulbs that both do hi/lo... and wanted to keep it that way
EDIT: like I promised.
http://www.xenonexpert.com/ddm_moto_kit.html