| I also have a japanese bike which always amazes me when it will start after several months standing with no trickle charge.
However - as a precaution I have always used an optimate on my past 3 Dukes - no matter how short the lay-off.
Never had a problem with poor charge.
I know it should n't need it BUT its only a TINY inconvenience to plug in the optimate | 
Hybrid Mode
