And the other alternative is to upgrade the stator and rotor with a dc unit and rectifier from Trailtech.This will allow you a generous 100 watts from the generator of unadulterated DC.more than enough for an HID ba20d.
http://www.trailtechproducts.co.uk/acatalog/KTM_Stator_Kits.html
thinking about it, you could buy the HID kit and try it by running of the bike battery and see if its bright enough for you before you buy the trailtech kit.The charging system on the bike isnt man enough to run that load for long.Unless your bike has dc lights fed from the battery , then youre already sorted.
http://www.trailtechproducts.co.uk/acatalog/KTM_Stator_Kits.html
thinking about it, you could buy the HID kit and try it by running of the bike battery and see if its bright enough for you before you buy the trailtech kit.The charging system on the bike isnt man enough to run that load for long.Unless your bike has dc lights fed from the battery , then youre already sorted.