Simon, You'll have to ask Andy Muse for a go on his MC21 F-III. I'm sure he'll be at the next Donington day.

They are expensive to run, as much as an RS really, and cost as much to buy as well though. A kitted none F-III NSR would maybe be a better option while still having the 2 stroke buzz.
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If I have to take the carbs off once more...