In usual circumstances, a NSR dry clutch will easily handle the power without slipping, especially one with just 1000km of 'wear'. Have you seen how many plates are in the basket? Have you stripped the clutch plates out yet for inspection? Its very easy.
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Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30