My 2012 V-Twin Spyder just clocked 28,000 miles, and the valve clearances have never been checked nor spark plugs changed. I plan to have them done at the same time, ......( if I EVER have them done before trading for a new one) . My Spyder is running great, and the engine sounds the same to me as when it was new. I lost most of the patience of wrenching I had long ago. In my early 60s, changing my own oil and filter on my Vulcan Classic 1500 was about all I could handle, but I will be turning 74 in a month, ......and now, I never try to fix any thing that ain't broke, as many say. I am encouraged by these mileage numbers reported by members who shared here, regarding valve checks. I agree that paying $800 a pop to check valves every 14,000 miles, and most not needing adjustment even after 50,000 miles, doing a valve job rather than checking every 14,000 miles would be more cost effective. I once owned a 73 Harley XLCH 1000 CC Sportster with solid Lifters that needed valve adjustments about every 3000 miles. What a nightmare! That engine vibrated so much, that it would bring any Gal to Ecstasy sitting on the seat during a short ride around the block! ( I was too dense to figure out why so many young Gals begged me to take them for quick spins around the block on my vibrating Harley! )

My Sister finally clued me in after she hopped on the back and remarked,..."ohhhh God,......I wish my husband would buy a Harley like this one." Haha. But you could hear the valve train rattling on the Harley as soon as the valves started getting out of adjustment, plus, it starting missing and hesitating, unlike my Spyder,....so far at least. At 74, I am hoping the valves might get out of adjustment just enough for Gals to again start begging me to ride on the back. Haha. ( Wishful thinking.)