I've had my 2013 Stelio NTX for almost 2 years and 10K miles now and really like everything about it. My only complaint: I have the commonly reported clutch "groan" which happens when starting from stop when the bike is cold and goes away after about 10 mins. This alone is a minor annoyance in an otherwise awesome bike. Does anyone know if these groaning clutches fail or wear out prematurely? What kind of mileage should I expect before having to replace it?