1) Never...not even on the track.
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Ran off a couple of pubic roads, however, remained upright...too hot into left corners when I was young & dumb.
Never down & crashed on public roads - God Bless me.
The past 10 yrs. or so, I ride like an old man on public roads...I just enjoy the machinery...much more dangerous than the track.
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When the time comes, if it eventuates for you, share what you end up with.