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In terms of the physical riding experience, it's difficult to travel so fast that you get into trouble, and there's generally plenty of thinking time. Occasional surprises are more likely than scariness - daydreaming probably poses the greatest risk, and can lead to a failure to anticipate the need for early application of dubious brakes.
You might want to look into NOVA before importing stuff - HMRC will probably demand a share if you're bringing in whole machines, though it might be different if you're dealing with parts only.
Looking at ciao and si prices in the UK am thinking of importing them to the uk and flogging them.
How scary are those things to ride?