2011 RT SE-5 55,000 Miles

I was out riding yesterday and being a bit aggressive. I noticed that if I'm cruising along, in any gear, at a comfy pace (maybe 4500 to 5000 RPMs) if I hit the gas full throttle the RPMs instantly jump to about 7000 before the bike actually speeds up. This only lasts around 2 or 3 seconds before the RPMs come back down as the bike then speeds up with the engine. If this has happened before I hadn't noticed it. Otherwise its running fine. The oil is fine. Clearly there is some slippage. How much, if any, is acceptable ? Your thoughts are welcome.