My friend installed the Powerdynamo ignition (looks identical to yours) on his 'MT175' (MT125 frame for road legality, everything else either MR175 or CR125M). Long story short, the motor felt very low on power compared to his other MR175 with CR ignition, so he began a dialogue with PD to try and figure it out. It turns out PD makes an optional advance unit (IMO absolutely vital for decent performance, I feel it's the main benefit of electronic ignition systems) with selectable advance curves for their CR ignition, which my friend bought but has yet to install. I don't have a direct link for the advance unit at the PD site, my friend said he really had to look to find any mention of it.
A modern laptop-type battery could be mounted to the seat pan with a charging cable accessible from the airbox, and would power a wicked-bright LED lighting setup at max output for at least 6 hours straight before needing a charge; it would also remove several pounds of weight from your crank and substantially reduce magnetic drag. Just sayin'
It's amazing the battery-powered things that are available these days - this one's in my garage right now (sorry, couldn't help myself):
http://i399.photobucket.com/albums/pp74 ... 202014.jpgRay