No offense, but it isn't "regular dino oil," it is motorcycle specific oil, formulated to be used in engines that share lubrication with the transmission.
As far as I know, the only real difference between "motorcycle"-spec oil and not, is that motorcycle-spec oil is guaranteed not to have extra lubricants that can cause the clutch to slip. Otherwise the research I've seen shows them to be exactly the same.
If a manufacturer says an engine can go 7,500 miles between oil changes, using conventional oil, 5,000 mile won't be an issue. Neither will 6,000 on occasion.
If that's what it says, then that's what it says. Notice that the warranty isn't exactly a hundred thousand miles, though. Every report of conventional oil I've ever read shows the shear strength falling off precipitously after approximately 3k miles, less if the cold weight and operating temperature weight delta is greater than 20 (e.g. 10w40).
By all means change your bike's oil at whatever interval you feel appropriate. However, the objective data doesn't support your numbers, from what I've read. Oil change intervals prescribed in owner's manuals are driven by marketing departments just as much as by engineers; if you think otherwise, you're fooling yourself, IMO.
