My 2022 NC750x dct needs the OEM Dunlop rear tire to be replaced after just 4300 miles. My local Honda dealer has quoted a good price for the Shinko 009 Raven rear of just $93.78 + tax for the tire itself, but the ride out price is double that at $188.07 (labor, state fees, 'shop supplies' and a valve stem). The newer NC's like mine come with the 90 degree metal valve stems and I was wondering if these metal valves need to be replaced each time. Looking up the dealer's part number for the new valve stem it seems he has quoted for a standard vertical rubber one, which of course I don't want. I can understand the old rubber style being replaced each time but is it necessary or even desirable to mess with the factory fitted metal ones? Bike going in Thursday so appreciate soonest responses, thanks.