In any case, the first thing I would do is take the exhaust pipes off and have a good look up the exhaust ports (with a torch) as you slowly turn it over by hand with the kick start. This will most likely let you know if it was a seizure or not.

I know it was a year ago, but can you describe HOW it stopped?
Was it a sudden (electrical) stop or a slightly less than sudden (possible? seize) stop or a slow (ran out of petrol) stop??
Maybe an intermittent thing followed by a stop?

As I'm sure you can appreciate, diagnosis via text is always going to be pretty difficult.
Any information helps, usually.
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