Oddly, I would have to say not many Motorcycles change the design of circuits and some are very similar. So, I would have to say that this is probably good in most cases for some motorcycles with similar design.
However, this is true with older motorcycles (Not sure about newer, because I ride an 82 Yamaha) due in part the older designs are 6v or 12v and could need different regulation. But, I'm not able to define which or if it will provide for both or not. Many DIY folks have done some interesting things with there bikes and some are able to convert them from 6v to 12v I'm told?
Many Motorcycles have similar designs and have some interchangeable parts. The electrical systems are not unique and have for the most part similar design features.
So, if this is true maybe just some tweaking is needed to do the work needed to make both 6v and 12v to regulate the voltage requirements of the bike.
kv
Edit,
crutschow, didn't know you had a bike.