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I think I had a bad one but the electrics were a complete disaster on mine. I rode it in anger 3-4 times and literally spent more time fixing indicators, rectifier, stator, headlights, clutch switch... I got fed up and sold it for £2k with no MoT (it was an R as well). It overheated once as well but I think that was related to the stator dying and the fan not operating in idle traffic.
While the electrics were terrible, the build quality on them is surprisingly good - nearly all stainless fastenings etc.
Buyer probably got a bargain as I'd fixed all the issues...
Have had both and can highly recommend either. Street was unruly, Speed more refined but both are more than capable of getting you into all sorts or trouble