I have a TT-225 too. That is a 1986.
I mostly have medium sized Kawasaki's although these two Yamahas, oh no; three: I have a QT-50, have treated me well too.
I have been riding the Triumph the most (2001 w/ 33,000 miles <g>) these last few years. I am sure the battery is bad on the KZ-1000 from me ignoring it. <g> I have been so damned busy with working work since early spring that I haven't ridden anything for months. The last time we had the dirt bikes out there were patches of snow left and a lot of mud. And some Really cold water in the puddles! <g>
Better days are coming they say. But I can never seem to get any definitive answer as to when. <g>
Where do you ride?