Hello, I am looking at a 2009 Stelvio, and of course current owner has no idea of it's been rollerized or not. It's a dealer, and they don't want to hassle with pulling a valve cover. Bike has 49,000 miles. Would a flat tappet have made it to 49,000 miles without anything being done to the tappets and cams? And if it had been rollerized, the bottom end must be ok. Any thoughts? Roll the dice? 😁