I have a 2010 Pfeiffer replica which I use for track day instruction. It's done 22000 miles, some of them quite hard ones and as said before it's a bit of a rattley engine but mine hasn't got any worse. I have the usual flakey paint on the sump and this afternoon have just bought a set of steering head bearings for it and it's had one fork seal replaced. Apart from that i have just done normal servicing with oil done at half the service intervals as it lives near the red line on occasion...valve clearances were all in tolerance when checked. I found it sensitive to tyre choice, and run Conti road attacks which grip to angles of lean you probably won't see on the road with excellent stability and wear as well. A cracking little bike, enjoy!