Thanks - sad isn't it not even knowing what voltage the bloody thing is? I've done 35,000 miles commuting on this bike over the last 4 years and its been so reliable I haven't had to touch it once. Just have it serviced once a year. My last bike was a BSA Starfire when I was a student back in the 70's so I've missed out on a bit of development! I'll give it a charge at 12 volts and see if that helps.