The wife has an Aprilia Atlantic 500 she bought 3 months ago. I noticed that the voltage on the display only reads 11.5-11.8 during driving and the battery has gone dead once. (I recharged with my charger)
I am guessing this may be the faulty Voltage regulator problem? Or bad battery. May have to download a service manual on do some voltage testing.
I have done quite a bit of searching and have come across a honda vrf400 repair:
but also see others that use a mosfet? or shanghai or shindengen ? (think I mispelled that)
Is there a sticky on this Mod/ repair? (cant seem to find it on the site)
Dealer wants over 230.00 for a oem VR. (ouch!)
Any help or where to look appreciated