resurecting an old thread, after a jolly good google, I had the same on my 110 , and read all the causes / symptoms etc, anyway tracked it down to movement of the front springs. I noticed a thin rust line on the lower 1 1/2 coils, where they rub, so I doused the lower 1 1/2 coils and spring...

read somewhere that the Numax batteries CCA rating is not quite accurate. Because its essentially a marine battery, its cca ia measured at a different ambient temp, as its always warmer on water than in a frosty valley.

seriously NO B/S if you want MINT then try marple road garage in stockport, they ONLY buy the best, but then SO do I.