The 500's are too old aren't they? + Doohan didn't even like the fuel injection bike, let alone TC.
I can't find it now but there's an interview with Simoncelli where he's talking about his time on the 250 Aprilia, he say's that had full TC with 6 different settings and he always left it on #6 (the highest setting).
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Please do not PM me technical questions, if you can't find it on the Forum start a thread