| I thought about the 600 only rule and I too thought this would be a good idea, but I remember the comment that Lizzie made - what if you already have a 620ie and wanted to take part in the racing? Would you sell the bike to buy an older monster or purchase another monster purely to race? It doesn't make sense to do that if you're in that position.
I too don't like the thought of control tyres - surely any "road legal" tyre is enough to suit the purpose? | 
antonye
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