2 Stroke or 4 Stroke?
It would be nice if there was an exact hourly figure, but that's just not the truth. That's why we measure & assess. If you know how hard you are on your bike you'll be able to get the most out of your machine.
2 strokes & 4 strokes get very similar amounts of time on their top ends & bottom ends these days. The difference if just the cost of repairing them when it's time.